I want to buy a electric welding argon arc welding dual-purpose welding machine, can fully melt three two welding rod, model 300 or 315, I do not know how the Shenzhen Ruiling.

Ruiling do things inverter DC welding machine, electrode hand arc welding is ZX7 series.

Diameter 3.2 mm welding rod, recommended ZX7-250 welding machine is completely enough.

ZX7-300 ZX7-315 welding machine, the use of 3.2 ㎜ diameter welding rod seems a little big, the use of 4.0 ㎜ diameter welding rod is small. Not very economical.

This kind of welding machine is not very suitable.