HWASHI Automatic Medium Freuency DC Welding Machine for Aluminum / Copper Products FEATURE 1.Energy Saving: Compare with using low frequency, it can help to reduce the consumption of electric energy. The transformer of the same weight could output more energy. It can also be conveniently used with the large automatic welding clamp. 2. In a semi-automatic machine, one medium frequency transformer can replace many low frequency transformers which can help to reduce the parallel