... and ripple line weld. 2.Voltage monitor automatically. Spot Welder WT-9999It can be used for super-thin,thin and thick ... meson vertical pulling spot welding.plate pressing,snakes line and triangle shim functions.Humaniy design of the body surface.Voltage ... meson,vertical puling spot welding.Flatten,waveform line,whorl post triangle shim etc,welding fuction for different plates.Digital display.Large ...