... machine for screw shaft 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 machine, ... workshop is equipped with CNC Laser Cutting Machine, CO2 Welding Machine, Sandblasting and Painting facilities to cover ...