China Good quality ANSI Standard Sprockets Industrial Gear Teeth Rack Bevel Bicycle Stainless Transmission Drive Part Carbon Steel Plate Idler Wheel Roller Chain Sprocket with CE crank and sprocket 由 ep | 4 月 11, 2023 | Product CatalogProduct Description Product DescriptionHeat treatmentHarden teeth, tempering, quechingSurface treatmentzinc plated, blacken, phopharization, carborizedProcessForging( casting)—lathe- teeth shaping—finishing—oil washing—Packing ,made by CNC...
