... protection function Thyristor double sides spot weldingPLR-7 is for professional car body workshops. It allows spot welding 2 faceswith a pneumaticclamp ... welding can be chosen; 4.Heat,meson,vertical pulling,spot welding,flatten,waveform line,whorl post,triangle shim etc welding ... function,Can turn 360 degree; 7.Triangle shim direct spot welding repair; 8.LCD digital chinese and english graph ...