3 piece can seam welding machine 1.make 18L ... ,20L barrel, square can 2.make paint can, food can, large can, tank, container 3 ... piece can seam welding machine1. technology progresscutting---rouding---welding---coating ... body welder, can manufature, can making, seam welding machine, seam welder, can body making machine, canning machine ...