... 5Brand:Shantin,OEM Other name:Welding motor,welding machine spare parts,welding partsDepending on our welding process,Shantin can ... hole)Surface treatment:Carbon Steel: Sand blasting, Painting(spray coating)Stainless Steel: Sand blasting, acid cleaning, alkali wash, ... passivating, painting(spray coating)Quality control:RT, MT, PT, UT machines, Universal testing ...