对赛车链条用钢的化学成分及调质后的机械性能进行了研究，从而确定了适用赛车链条用钢的最佳化学成分。

The paper studies the chemical composition of steel for racing bicycle chain and the mechanical properties after being quenched, then the optimum chemical composition of steel is determined.

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用宽吊带吊装涂塑管件，不允许使用链条，钢索，钢钳或者其他破坏涂层的吊装工具，不能拖拉滚动钢管。

Coated articles shall be hoisted using wide-belt slings. Chains, cables, tongs, or other equipment that causes damage to the coating will not be permitted, nor will dragging or skidding of the pipe.

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针对赛车链条用带钢对各种力学性能的苛刻要求，通过化学成分筛选试验与工业性生产相结合的方法，设计了不同化学成分的试验钢，从中优选出合适的合金成分配比方案。

Considering the strict requirements of racing bicycle chain, the optimum composition had been selected from the tested steels, using the screen method in laboratory test combined with industrial test.

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针对赛车链条用带钢对各种力学性能的苛刻要求，通过化学成分筛选试验与工业性生产相结合的方法，设计了不同化学成分的试验钢，从中优选出合适的合金成分配比方案。

Considering the strict requirements of racing bicycle chain, the optimum composition had been selected from the tested steels, using the screen method in laboratory test combined with industrial test.

youdao