... smooth, the burr, scratch, corrosion and oxidation reflect, copper plating uniform firm, become warped distance acuities 25 mm, stiffness moderate ... smooth, the burr, scratch, corrosion and oxidation reflect, copper plating uniform firm, become warped distance acuities 25 mm, stiffness moderate ... , mig gas shielded welding, ac arc welder, etc. inverter power supply protect welding machine mig180