特殊的材料包括球墨铸铁和钢煅品，大部分机轴经过热处理，表面硬化、渗氮和感应淬火。
Typical materials include ductile iron castings or steel forgings. Most crankshafts require some form of heat treating including case hardening, nitriding and induction harden.
产品材料有：铸铜，煅铜，不锈钢，石材，玻璃钢。玻璃钢仿铜，电镀，树脂，砂岩等。
Product materials: copper, burnt copper, stainless steel, stone, glass and steel. Glass fiber reinforced plastic imitation bronze, electroplating, resin, sandstone and so on.
产品材料有：铸铜，煅铜，不锈钢，石材，玻璃钢。玻璃钢仿铜，电镀，树脂，砂岩等。
Product materials: copper, burnt copper, stainless steel, stone, glass and steel. Glass fiber reinforced plastic imitation bronze, electroplating, resin, sandstone and so on.
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