Wax precision casting is adopted for the shaft sleeve, increasing material utilization ratio by 77% and realizing "less cutting and no cutting".

铸造工艺采用石蜡精铸成型，使材料利用率提高77％，达到少切削、不切削目的；

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All of the casting dimension precision, surface roughness and material control have reached national standard.

铸件尺寸精度，表面精糙度及材质控制均达到国家标准要求。

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