... sewing machine parts 1.Material:steel 2.Finish: none 3.OEM Machining 4.Tolerance:+/-0.1mm OEM industrial sewing machine parts, nonstandard industrial sewing machine ... , alloy steel, stainless Steel, Tungensten etc. 2.Brass, bronze, aluminum, magnesium, Aluminum alloy, ... carburizing, nitrogen, carbonitriding etc.. Production ProcessArrange Production 2. Production Process 3.Testing 4. Packaging Customer ...