... zinc, brass, plastic etc. Making process: Stamping, deep drawing, bending, punching, threading, welding , tapping, riveting, grinding Surface treatment: ... ISO9000:2008 , EN15085-2, ISO3834-3High technique of welding, stamping, bending, coating, injection moldingCompany profile Aolin Vehicles ... and all products need to technique such as welding, stamping, bending, coating, injection molding is welcomed. ...