... .sewing machine parts 3.mechanical part 4.alloy steel part 5.China 1.precision casting2.sewing machine parts3.mechanical part4.alloy steel part5.China1.precision casting2.sewing machine ... casting, investment castingKey specification1.Material: stainless steel, carbon steel, alloy steel ,iron ,alloy, 2.Standard: ASTM\DIN\BS\JIS3.Surface finish: passivated, stain ...