Pneumatic AC Pulse Spot Welding Machine for Household Locks DESCRIPTION Firm joint,no black remark, the welding surface is clear. Suitable for welding of multiple types of products. Multiple times of continuous discharging Be able to finish welding at one time No black coating after welding, no oxidation Low cost No need of subsidiary materials Precise mould designed Convenient and simple all-directions adjustment Applicabe to all kinds of hardware. FEATURE Pneumatic Control