... such as: small heataffected zone in welding, adjustable size of weld spot; fine, smooth and pretty welding spot without postwelding processing ... , relieve fatigue, improve work efficiency.Automatically adjust the size of solder (0.2 mm2 mm), without moving the workpiece, it can ... can also be applied to repair abscess of denture and weld tiny precision components such as nickel strip of battery, IC ...