... , ASTM, BS3) Weight: 0.01-500kg4) Production process: investment casting (water glass and silicasol casting process), forging, stamping5) ... , construction parts, valve/valve parts.stainless steel castings, steel investment castings, stainless steel gear boxes, 304, 316, CF8, ... castings, lose wax casting, heatresistant castingNingbo ZeYang Machinery co.,Ltd have its own factories and has rich and ...