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INSTRUCTION MANUAL FOR MIG WELDER
3.300.674/A
15/06/021
INSTRUCTION MANUAL FOR MIG WELDER
IMPORTANT:
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
USING, OR SERVICING THE WELDING MACHINE, PAYING
SPECIAL ATTENTION TO SAFETY RULES. CONTACT YOUR
DISTRIBUTOR IF YOU DO NOT FULLY UNDERSTAND THESE
INSTRUCTIONS.
1
Never place any filtering device over the air intake points of
this welding machine.
The warranty shall become void if any type of filtering device
is used.
Mount the parts supplied with the machine as shown in the
figure 1.
INSTALLATION
This machine must be used for welding only. It must not be
used to defrost pipes.
It is also essential to pay special attention to the chapter on
SAFETY PRECAUTIONS.
The symbols next to certain paragraphs indicate points requiring extra attention, practical advice or simple information.
This manual must be stored carefully in a place familiar to
everyone involved in using the machine. It must be consulted
whenever doubts arise and be kept for the entire life-span of
the machine; it will also be used for ordering replacement
parts.
1.1
PLACEMENT
Unpack the machine and place it in an adequately ventilated
area, dust-free if possible, taking care not to block the air
intake and outlet from the cooling slots.
CAUTION: REDUCED AIR CIRCULATION causes overheating and could damage internal parts.
Keep at least 500 mm of free space around the machine.
Fig. 1
2
DESCRIPTION OF THE MACHINE
Fig. 2
2
A) On/Off switch.
Switches the welder on and off. On some versions this
switch is also used to select the welding voltage range.
B) Wire speed adjuster knob.
Use this knob to set the wire feed speed. This knob is not
active when the extension cable is connected to the
connector E
C) Spot time adjuster knob.
Use this knob to set the spot welding duration time. When
the button on the welding gun is pressed, the machine will
start spot welding and continue for the time set on this
knob. To start the next welding cycle, release and press
the welding torch button.
D) Welding voltage selector switch.
Use this selector switch to set the welding voltage.
E) Remote connector.
Connector for the extension cable.
F) Welding torch connector.
Connector for the welding torch (supplied) or the extension cable.
G) Earth socket.
Connect the earth cable clamp to this socket.
H) Ammeter (optional).
The ammeter displays the welding current.
I) Yellow led.
This lights up when the thermostat interrupts welder
operation.
L) Green led.
This lights up when the selector switch (A) is on.
M) Rest time adjusting knob
By means of this knob you can adyst the rest time
between a spot weld and the other. Such function is active
only when the spot time is on (knob C).
3
GENERAL DESCRIPTIONS
3.1 SPECIFICATIONS
This welding machine allows welding of soft steel, stainless
steel and aluminium.
3.2 EXPLANATION OF TECHNICAL SPECIFICATIONS
EN60974.1 The welding machine is built according to these
international standards.
N°
Serial number, which must always be indicated in
any inquiry regarding the welding machine.
1
Single-phase rectifier - transformer.
External machine characteristic.
Secondary no-load voltage (peak value)
The duty cycle expresses the percentage of
10 minutes during which the welding machine
can run at a certain current without overheating.
Example: X = 60% at I2 = 100 A
This means that the machine can weld with a
current I2 = 100A for 6 out of 10 minutes, thus
60%.
I2
Welding current
U2
Secondary voltage with welding current I2
U1
Rated power voltage.
1~ 50/60 HzSingle-phase 50-or 60-Hz power supply.
I1
Current absorbed at the corresponding welding
current I2
IP21
Degree of housing protection.
Grade one as the second digit means that this
device is not suitable for use outdoors in the rain.
S
Suitable for use in increased hazard areas.
NOTE: The welding machine has also been designed for use
in environments with grade 3 pollution (see IEC 664)
U0
X
3.3
DESCRIPTION OF PROTECTION
This device is protected by a normally closed thermostat on
the power transformer. When the thermostat is tripped the
machine stops welding, while the motor-driven fan continues
to run and the yellow LED lights.
After it has been tripped, wait a few minutes to allow the
generator to cool down.
4
INSTALLATION
The machine must be installed by skilled personnel. All
connections must be made in compliance with current
regulations and in full respect of safety laws (see standards
CEI 26-10 and CENELEC HD 427).
Make sure that the wire diameter corresponds to the one
indicated on the roller, and mount the wire reel. Make sure
that the welding wire passes through the groove in the small
roller 3.
Before connecting the power cable 29, make sure that the
power voltage corresponds to that of the welding machine,
then:a) for permanent connection to the power mains without a plug, you must insert a main switch having a
suitable capacity in compliance with the rated specifications.
b) for a plug-socket connection, use a plug having a
suitable capacity in compliance with the rated specifications. In this case the plug must be used to
completely disconnect the machine from the mains,
after setting the switch A to “O” (off).
The yellow-green wire must be connected to the earth
terminal. Connect the earth clamp to the part to be welded.
The welding circuit must not be deliberately placed in direct
or indirect contact with the protection wire except in the
workpiece.
If the workpiece is deliberately grounded using the protection wire, the connection must be as direct as possible, using
a wire at least as large as the welding current return wire, and
3
connected to the workpiece at the same point as the return
wire, using the return wire clamp or a second grounding
clamp placed next to it.
All precautions must be taken to avoid stray welding currents.
Turn the machine on using the switch A.
Remove the tapered gas tip by turning it clockwise.
Unscrew the contact tip.
Do not press the torch trigger until you have read the
instructions carefully.
It is important to make sure the machine is turned off
whenever changing the wire reel and wire roller, to prevent
the wire feed motor from starting accidentally.
Press the torch trigger and release it only when the welding
wire comes out.
welding wire can cause puncture wounds.
Never aim the torch at parts of the body, other people or
metals when loading the welding wire.
Screw the contact tip back on, making sure that the hole
diameter corresponds to the wire used.
Slide the tapered gas welding tip on, always turning clockwise.
4.1
CONNECTING THE GAS HOSE
G
The gas cylinder must be equipped with a pressure
reducer and flow meter.
G If the cylinder is placed on the cylinder holder of the
machine, it must be held in place by the chain provided and
be of an appropriate size to avoid jeopardizing the stability
of the machine.
G Connect the gas hose leaving the back of the machine to
the pressure reducer only after the cylinder is in place.
G Open the gas cylinder and set the flow meter to approximately 8-10 lt./min.
CAUTION: Make sure the gas used is compatible with the
material to be welded.
4.2 GENERAL NOTES
Before using this welding machine, carefully read the regulations CEI 26/9 or CENELEC HD 407 and CEI 26/11 or
CENELEC HD 433. Also make sure that the insulation on
cables, torch and earth cable is intact.
5
If the speed is too fast, the wire tends to stick to the piece
and cause the torch to skip; if the speed is too low, the wire
melts in spaced drops or the arc does not remain lit.
When you have finished welding, turn off the machine and
close the gas cylinder.
For the correct welding angle see figure 3.
5.3
WELDING ALUMINIUM
The welding machine must be prepared as for welding mild
steel with gas protection, but with the following differences:
- 100% ARGON as the protection gas for welding.
- A wire having a composition suited to the base material to
be welded.
For welding ALLUMAN: 3÷5% silicon wire
- For welding ANTICORODAL: 3÷5% silicon wire
- For welding PERALUMAN: 5% magnesium wire
- For welding ERGAL: 5% magnesium wire
If you only have a torch for steel wires, the same shall be
modified in the following way:
— Make sure that lenght of torch cable does not exceed 118
inches (it is advisable not to use longer torches).
— Remove the brass sheath-holding nut, the gas and the
current nozzles, then slip the sheath off.
— Insert the teflon sheath for aluminium and ensure it
protrudes from both ends.
— Screw the current nozzle so that the sheath adheres to it.
— Insert the sheath holding nipple and the O-Ring in the free end of
the sheath and secure with the nut without tightening too much.
— Slip the brass tube on the sheath and insert both into the
adapter (after removing the iron tube which was fitted inside the
adaptor).
— Cut the sheath diagonally so that it stays as close as
possible to the wire drive roller.
Use drive rolls that are suitable for aluminium wire. The wire
pressing roll must be properly tightened.
Make sure that the diameter of the contact tip hole corresponds to the wire diameter that is going to be used.
Use abrasive grinders and tool brushes specifically designed
for aluminium. Never use these tools on other materials.
REMEMBER that cleanliness equals quality.
The wire spools must be stored in plastic bags with a
dehumidifier.
See the figure 3 for correct torch inclination.
WELDING
5.1 SPOT WELDING
For spot welding, replace the gas-weld nozzle with the
special spot-weld nozzle. Exert enough pressure with the
torch to achieve a good junction of metal sheets.
This can be obtained by positioning the knob (C) on "spottime" and adjusting the spot-welding time through the knob.
ATTENTION: Metal sheets will have to be perf
5.2
WELDING MILD STEEL
Either 75% ARGON + 25% CO2 or 100% CO2 may be used
for welding mild steel.
Select the welding current by means of the rotary switch D.
Move the torch near the welding point and press the trigger.
Adjust potentiometerl knob B until the welding is done with
a constant, continuous noise.
4
Fig. .3
5.4
WELDING STAINLESS STEEL
The welding machine must be prepared as for welding mild
steel with gas protection, but with the following differences:
- Reel of stainless steel wire compatible with the composition
of the material to be welded.
- Cylinder containing 98% ARGON + 2% 02 (recommended
composition)
The recommended torch angle and welding direction are
shown in figure 3.
secondary side of the machine. Prevent the wires from coming
into contact with moving parts or parts that heat up during
operation. Replace all clamps as on the original machine to
prevent a connection from occurring between the primary and
secondary side if a conductor accidentally breaks or disconnects.
6.3
TROUBLESHOOTING GUIDE
PROBABLE CAUSE
TROUBLE
6
MAINTENANCE AND CHECKS
6.1
GENERAL NOTES
G Turn off the welding machine and unplug the power cord from
the socket before each checking and maintenance operation.
G Moving parts can cause serious lesions
G Keep away from moving parts.
G INCANDESCENT SURFACES can cause serious burns.
G Let the unit cool before servicing.
G Periodically remove any dust or foreign matter that may
have deposited on the transformer or diodes; to do so, use
a jet of clean, dry air.
G When replacing the wire roller, make sure the groove is
aligned with the wire and corresponds to the diameter of the
wire used.
G Always keep the interior of the gas nozzle clean to avoid
metal bridges created by welding dross between the gas
nozzle and the contact tip. Make sure the outlet hole of the
contact tip has not expanded excessively; if so, replace.
G Strictly avoid striking the torch or allowing it to suffer
violent impact.
6.2
Welding with a lot Voltage adjustment switch
has a loose contact
of metal spatter
The wire jams or
entangles between
the drive rolls and
the torch infeed
wire guide
6.2.1 Instructions for performing repairs
G After rewinding the transformer or inductance, the welding
machine must pass the applied voltage tests as indicated in
table 2 of paragraph 6.1.3 of the standard EN 60974.1 (CEI
26.13). Compliance must be verified as specified in 6.1.3.
G If no rewinding has been done, a welding machine that has
been cleaned and/or revised must pass an applied voltage
test with test voltage values equal to 50% of the values given
in table 2 of paragraph 6.1.3. Compliance must be verified
as specified in 6.1.3.
G After rewinding and/or replacing parts, the no-load voltage
must not exceed the values given in paragraph 10.1 of EN
60974.1.
G If the repairs have not been performed by the manufacturer,
repaired welding machines in which some components have
been replaced or altered must be marked in such a way that
the person who performed the repairs is clearly identifiable.
G After making repairs, take care to re-order the wiring so that
there is certain insulation between the primary side and the
Porosity in the
welding seam
Replace the switch
Improper adjustment of
welding parameters
Select the correct
parameters through the
welding voltage switch
and the wire-speed
adjustment potentiometer
Insufficient grounding
Check grounding
connections
Contact tip with wrong
diameter
Replace
Misalignment of the drive
roll groove
Realign
Obstructed or clogged
liner
Remove and clean
Drive roll with too large a
No wire feed or
irregular wire feed groove
REPAIRING THE WELDING MACHINE
Experience has shown that many accidents are caused by
repairs performed incorrectly. That is why it is just as
important to check a repaired welding machine carefully and
completely as it is for a new welding machine.
In addition, this protects the manufacturer from being held
liable for defects when the true fault lies elsewhere.
REMEDY
Line fuse blown
The welding
Replace line fuse
machine supplies Burnt out diode or diodes
Replace
limited current
Burnt out electronic board Replace
Loosened torch or earth Tighten all connections
connections or any other electrical power connections
Replace the drive roll
Obstructed or clogged
liner
Remove and clean
Wire holding roller not
completely tightened
Tighten all the way
Clogged contact
Replace
tip
Insufficient shielding gas
Increase gas delivery
Excess oxidation of the
edges to be welded
Thoroughly clean the
edges with a metal
brush
Gas nozzle partially or
completely clogged by
spatter
Remove and clean or
replace being careful
not to clog the gas
outlets
7 SAFETY PRECAUTIONS
7.1 Fire
G Avoid causing fire because of sparks, slag,
hot metal or pieces.
G Make sure that suitable fire-fighting equip-
ment is available close to welding area.
G Remove all flammable and combustible material from the
welding area and its surrounding (32 ft minimum).
G Do not weld containers of combustible or flammable
material, even when empty. These must be carefully cleaned
before being welded.
G Allow the welded material to cool down before touching it or
putting it in contact with combustible or flammable material.
G Do not weld parts with hollow spaces, containing
flammables.
5
G Do not work under conditions with high concentrations of
combustible vapours, gases, or flammable dust.
G Always check the work area half an hour after welding so
as to make sure that no fire has started.
G Do not keep any combustible material such as lighters or
matches in your pockets.
7.2 Burns
G Wear fire-proof clothing all over your body in order to protect
your skin against burns caused by ultraviolet radiation given
off by the arc, and from weld metal sparks and slag.
G Wear protective clothing-gauntlet gloves designed for use
in welding, hat and high safety-toe shoes. Button shirt collar
and pocket flaps, and wear cuff-less trousers to avoid entry
of sparks and slag.
G Wear helmet with safety goggles and glasses with side
shields underneath, appropriate filter lenses or plates (protected by clear cover glass). This is a MUST for welding to
protect the eyes from radiant energy and flying metal.
Replace cover glass when broken, pitted, or spattered.
G Avoid oil or greasy clothing. A spark may ignite them.
Hot metal such as electrode stubs and workpieces should
never be handled without gloves.
G First-aid facilities and a qualified first-aid person should
be available for each shift unless medical facilities are close by
for immediate treatment of flash burns of the eyes and skin
burns.
G Ear plugs should be worn when working on overhead or in
a confined space. A hard hat should be worn when others
work overhead.
G Flammable hair preparations should not be used by
persons intending to weld or cut.
7.3 Fumes
Welding operations give off harmful fumes and metal
dusts which may be hazardous to your health, therefore:
G Work in a well-ventilated area.
G Keep your head out of fumes.
G In closed areas, use suitable exhaust fans.
G If ventilation is not enough, use breathing sets approved
for this procedure.
G Clean the material to be welded of any solvents or halogen
degreasers giving rise to toxic gases. Some clorine solvents
may decompose with the radiation emitted by the arc, and
create phosgene gas.
G Do not weld plated metals or those containing lead,
graphite, cadmium, zink, chrome, mercury or beryllium,
unless you have the proper breathing set.
G The electric arc creates ozone. A long exposure to high
concentrations may cause headaches, nasal, throat and eye
irritation as well as serious congestions and chest pains.
IMPORTANT: DO NOT USE OXYGEN FOR VENTILATION.
G Gas leaks in a confined space should be avoided. Leaked
gas in large quantities can change oxygen concentration
dangerously. Do not bring gas cylinders into a confined space.
G DO NOT WELD where solvent vapors can be drawn into
the welding atmosphere or where the radiant energy can
penetrate to atmospheres containing even minute amounts
of trichloroethylene or perchloroethylene.
6
7.4 Explosions
Do not weld above or near containers under pressure.
G Do not weld in environments containing explosive
dusts, gases or vapours.
This welding machine uses inert gases such as CO2, ARGON, or a mixture of ARGON + CO2 for the protection of the
arc, thus you should take special precautions:
A) CYLINDERS
G Do not directly connect cylinder to the machine gas hose
without a pressure regulator.
G Handle or use pressure cylinders in conformity with the
existing rules.
G Do not use leaking or damaged cylinders.
G Do not use cylinders which are not well secured.
G Do not carry cylinders without the protection of the
installed valve.
G Do not use cylinders whose content has not been clearly
identified.
G Never lubricate cylinder valves with oil or grease.
G Do not put the cylinder in electrical contact with the arc.
G Do not expose cylinders to excessive heat, sparks, molten
slags or flame.
G Do not tamper with the cylinder valves.
G Do not try to loosen tight valves by means of hammers,
keys, or any other object.
G NEVER DEFACE or alter name, number, or other markings
on a cylinder. It is illegal and hazardous.
G Do not lift cylinders off the ground by their valves or caps,
or by chains, slings or magnets.
G Never try to mix any gases in a cylinder.
G Never refill any cylinder.
G Cylinder fittings should never be modified or exchanged.
B) PRESSURE REGULATORS
G Keep pressure regulators in good condition. Damaged
regulators may cause damages or accidents, they should
only be repaired by skilled personnel.
G Do not use regulators for gases other than those for which
they are manufactured.
G Never use a leaking or damaged regulator.
G Never lubricate regulators with oil or grease.
C) HOSES
G Replace hoses which appear damaged.
G Keep hoses unwound in order to avoid bending.
G Keep the excess hose wound and out of the working area
in order to avoid any damage.
7.5 Radiations
Ultra-violet radiation created by the arc may damage your eyes and burn your skin. Therefore:
G Wear proper clothing and helmet.
G Do not use contact lenses!! The intense heat coming from
the arc may cause them to stick to the cornea.
G Use masks with grade DIN 10 or DIN 11 safety lenses at
the least.
G Protect people in the surrounding welding area.
Remember: the arc may dazzle or damage the eyes. It is
considered dangerous up to a distance of 15 meters (50
feet). Never look at the arc with the naked eye.
G Prepare the welding area so as to reduce reflection and
transmission of ultra-violet radiation. Paint walls and exposed surfaces in black to reduce reflection, install sheathings
or curtains to reduce ultra-violet transmissions.
G Replace mask lenses whenever damaged or broken.
7.6
Electric shock
Electric shock can kill.
All electric shocks are potentially fatal.
G Do not touch live parts.
G Insulate yourself from the piece to be cut and from the
ground by wearing insulated gloves and clothing.
G Keep garments (gloves, shoes, hats, clothing) and body
dry.
G Do not work in humid or wet areas.
G Avoid touching the piece to be welded.
G Should you work close to or in a dangerous area, use all
possible precautions.
G If you should feel even the slightest electric shock
sensation, stop welding immediately. Do not use the machine
until the problem is identified and solved.
G Always fit an automatic wall switch with adequate power,
possibly close to the machine, allowing you to immediately
switch the machine off in case of an emergency.
G Frequently inspect the power supply cable.
G Disconnect power supply cable from mains before replacing cables or before removing unit covers.
G Do not use the unit without protection covers.
G Always replace any damaged parts of the unit, with
original material.
G Never disconnect unit safety devices.
G Make sure that the power supply line is equipped with an
efficient earth plug.
G Any maintenance should only be carried out by qualified
personnel aware of the risks due to dangerous voltages
necessary for the operation of the unit.
is finished and before starting the machine.
7.10
Noise
These power source alone do not produce noise levels
exceeding 80 dB. The welding procedure, however,
may produce noise levels in excess of 80 dB. in
which case the machine operator must take the
necessary safety precautions as prescribed by the national
safety regulation.
7.7 Pace maker
G Magnetic fields from high currents can affect pacemaker
operation. Persons wearing electronic life support equipment (pacemaker) should consult their doctor before going
near arc welding, gouging or spot welding operations.
7.8. Caution! Welding wire can cause puncture wounds.
G Do not press gun trigger until instructed to do so.
G Do not point gun toward any part of the body, other people,
or any metal when threading welding wire.
7.9.Moving parts can cause injury.
Moving parts, such as fans, can cut fingers and hands and
catch loose clothing.
G Keep all doors, panels, covers, and guards closed and
securely in place.
G Have only qualified people remove guards or covers for
maintenance and troubleshooting as necessary.
G Keep hands, hair, loose clothing, and tools away from
moving parts.
G Reinstall panels or guards and close doors when servicing
7
Art. 536
Pos.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
DESCRIPTION
HINGED SIDE PANEL
COVER
DRIVE ROLL
LOCKING DEVICE
COVER
DRIVE ROLL PIN
KNOB
SPRING
REST
WIRE INLET GUIDE
SUPPORT
BEARING
LOCKING PIN
PIN
WIRE FEED MOTOR
COIL SUPPORT
HINGE
RUBBER MAT
REINFORCEMENT
COVER
INTERMEDIATE PLANE
GAS CYLINDER SUPPORT
Pos.
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
41
42
43
44
45
46
47
DESCRIPTION
CHAIN
FITTING
GAS HOSE
SOLENOID VALVE
INPUT POWER CABLE
CABLE OUTLET
BACK PANEL
RECTIFIER
FITTING
CONTACTOR
CONTACTOR SUPPORT
AUXILIARY TRANSFORMER
FRONT PANEL
CIRCUIT BOARD
THERMOSTAT
TRANSFORMER
RESISTANCE
FIXED SIDE PANEL
AXLE
COVER
FIXED WHEEL
IMPEDANCE
Pos.
48
49
50
52
53
54
55
56
57
58
59
60
61
62
63
74
75
76
77
78
79
DESCRIPTION
SUPPORT
SUPPORT
MOTOR
FAN
SWITCH
SWITCH
UNDERCARRIAGE
SWIVELING WHEEL
GIFAS SOCKET
FRONT PANEL
RUBBER PROTECTION
RUBBER PROTECTION
ADAPTOR
KNOB
COVER
KNOB
FRAME
CLOSING
CAPACITOR
HANDLE
EARTH CABLE
Pos.
47
49
50
51
52
53
54
55
56
57
58
60
61
62
63
74
75
76
78
79
80
DESCRIPTION
IMPEDANCE
SUPPORT
MOTOR
SUPPORT
FAN
SWITCH
SWITCH
UNDERCARRIAGE
SWIVELING WHEEL
GIFAS SOCKET
FRONT PANEL
RUBBER PROTECTION
ADAPTOR
KNOB
COVER
KNOB
FRAME
CLOSING
HANDLE
EARTH CABLE
SUPPORT
Art. 542
Pos.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
8
DESCRIPTION
HINGED SIDE PANEL
COVER
DRIVE ROLL
LOCKING DEVICE
COVER
DRIVE ROLL PIN
KNOB
SPRING
REST
WIRE INLET GUIDE
SUPPORT
BEARING
LOCKING PIN
PIN
WIRE FEED MOTOR
COIL SUPPORT
HINGE
RUBBER MAT
REINFORCEMENT
COVER
INTERMEDIATE PLANE
GAS CYLINDER SUPPORT
Pos.
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
DESCRIPTION
CHAIN
FITTING
GAS HOSE
SOLENOID VALVE
INPUT POWER CABLE
CABLE OUTLET
BACK PANEL
RECTIFIER
SHUNT
FITTING
CONTACTOR
CONTACTOR SUPPORT
AUXILIARY TRANSFORMER
FRONT PANEL
CIRCUIT BOARD
THERMOSTAT
TRANSFORMER
RESISTANCE
FIXED SIDE PANEL
AXLE
COVER
FIXED WHEEL
Art. 536
When ordering spare parts, alwais state the following: machine part number, item position number, the quantity, and the machine
serial number.
9
Art. 542
When ordering spare parts, alwais state the following: machine part number, item position number, the quantity, and the machine
serial number.
10
11
WIRING DIAGRAM
COLOUR CODE
A
B
C
D
E
F
G
H
K
J
I
L
M
N
O
P
Q
R
S
T
U
V
12
BLACk
RED
GREY
WHITE
GREEN
VIOLET
YELLOW
DARK BLUE
BROWN
ORANGE
PINK
PINK-BLACK
GREY-VIOLET
WHITE-VIOLET
WHITE-BLACK
GREY-BLUE
WHITE-RED
GREY-RED
WHITE-BLUE
BLACK-BLUE
YELLOW-GREEN
BLUE
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