1,Overall Welding; 2,Thickness :2mm; 3,Material: SUS304 The water leakage testing machine is our own developed machine. It is used to ... the water leakage after the inner barrel is welded. Its material is Stainless Steel. It woks by the air pressure principle ... .Main Structure Perfomance:1,Overall Welding;2,Thickness :2mm;3,Material: SUS304 Stainless Steel4,Subject welding seam is welded by double ...