... welding machine Upper cylinder pressure :1000N/pc Upper electrode stroke:50mm Input power supply:AC380V security door welding machineInput power supply single-phase AC380V±10%Welding ... of every welding head, welding time, welding current independent and adjustable, keep welding procedure work ... power supply, jockey and so on, generally, it is 1‰ or lower. security door hinge nut welding machine ...