... : Stainless steel,brass 2)Main production process: sheet metal cutting deep draw,punching Product Description:1)Item Name: ... :1.ISO 9001:2000 certified2. Many types of high-tech punching machines3. Advanced equipment and excellent R&D Team4. ... quality Control SystemManufacturing Process:1)Main production process: sheet metal cutting,deep draw,punching,machining,threading,and welding2)Surface treatment ...