WELDING MACHINE MMA / MIG-MAG INVERTER 40 -320 A The MULTIWELD 320T is a semi-automatic tri-phase welding machine, that combines MIG/MAG, cored wire, and MMA welding processes. Its intuitive interface integrates digital displays for easy and precise adjustment. Fitted with a powerful and precise 4-drive roll feeding system, the MULTIWELD 320T is perfect for welding Ø 1.2 mm wire without difficulty. Its welding performance is impeccable even when using aluminium.