打磨和组装预制金属零件来打造重型工业机械和设备，如建筑，养殖，加工机械，铁路车辆和飞机发动机。
Fit and assemble prefabricated metal parts to build heavy industrial machinery and equipment such as construction, farming, and processing machinery, railway vehicles and aircraft engines.
ST型缓冲器是铁路车辆运输过程中用于抗冲击的关键部件，推力锥作为其中的主要传力零件，其精度和表面质量要求都非常高。
ST bumper used to resist shock is a pivotal part in railway vehicle transportation. As primary load-transfer component of this part, thrust cone required very high precision and surface quality.
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