Our soldering turret offers excellent electric conduction, high mechanism strength, 1.The ring and accessory provided for welding gun to ensure the operation ... than 300μφ.7.2 Test voltage 1700V, 50Hz applied between gun arms, gun arm to ring for 2 minute, it shall have ... grinded, coating is not allowed.14. The material of welding gun: gun body made of Chromium Zirconium copper or brass, adopted high ...