roof's ventil stent part 1, Material: steel 2, Processing method: stamping,welding, ... from 5T, 35T, 63T,108T,200T,315T to 630T punching machines, totally 20 sets.We can provide in-house ... zinc, brass, plastic etc.Making process:Stamping, deep drawing, bending, punching, laser cutting, threading, welding , tapping, riveting, grindingSurface treatment:Hot ... , STP, STL and X-T) roof's ventil stent part