... ,EMS,UPS,etc >One year guarant Name:hot gun welding machine Type 4000I/4000Hvoltage/Frequency220v/50 Hz or ... press the switch key. Before working, you must pre-heat the machine about 2 minutes.3. Bringing up the ... the end of overlap edge.4. Handling the welding gun to left down, inserting the spout into the ... be joined into one. Then handling up the welding gun to the right for stopping it.7. Auto standby ...