... .5mm~2.5mm diameter : 50 cm~320 cm stainless steel water tower production line(1) Combine straight welder and welder ... plank stuff, it also weld steady, without and water leakage, this kind of machine can use for a long time.(2) Orbit ... and , air pressure . Welding spots bear the even pressure, the quality of welding is very good.(3) Automatic Air Pressure Multiple Convex ...