... / Month, Gear & Worm Gear 4,000 Pieces / Month, Valve 800 Pieces / Month, Welding Structural 50,000 Pieces / Month, Automobile Stamping Parts ... 800,000 Pieces / Month Gearbox 5,000 Pieces, Gear & Worm Gear 40,000 Pieces, Valve ... 5,000 Pieces, Welding Structural 200,000 Pieces, Automobile Stamping Parts 5 ...