... casting partfeatures:1) Process:a) Silica sol shelling-making processb) Lost wax processc) Complex shelling processd) Soluble glass process2) Materials:a) ... Pieces / Month, Gear & Worm Gear 4,000 Pieces / Month, Valve 800 Pieces / Month, Welding Structural 50,000 Pieces / Month, Automobile ... 5,000 Pieces, Gear & Worm Gear 40,000 Pieces, Valve 5,000 Pieces, Welding Structural 200,000 Pieces, Automobile ...