... the welding manipulator, auto-sub-merged arc welding machine. The welding assistant machine consists of the welding manipulator, auto-sub- ... ), the submerged arc welding machine, the cladding with strap, the welding positioner. It can weld metal vessels, steel structure in ... rollers and petro-chemical industries. LHJ4020 Welding Assistant Machine(for tubes),welding machine,metal processing machine