... operation,economic, 4.durable, reliable, portable. Mma welding machine: Arc WelderModel No:ZX7-200Specifications ParameterMODELZX7-200ZX7-250ZX7-300ZX7- ... alloy steel and cast iron, etc.2)The inverted frequency reaches 100kHz, corresponding with a dynamic response. Being ... China. We are specializing in Inverter Welding & Plasma Cutting Machine for 8 years. With strong technology & development capacity, ...