... applicable for moving welding of stainless steel and carbon steel with the advantages of stepless speed regulation to welding time, current, ressurized time and ... , due to pneumatic clamping workpiece, convenient & smooth welding torch movement, stable welding current, firm and beautiful welding spot, it is indispensable in the fields ... air(Mpa)0.4-0.8 Air-Pressured Impulse Spot Welding Machine