零件补充
In addition, much less time will be spent on equipment inspection, track repair, and parts replacement.
它实际上或理论上减少与铁轨的摩擦避免了磨损进而也就防止成本增加 、 铁轨修复和部件的替换.
It is difficult to meet construction requirements simply depending on repair and parts replacement to maintain operation.
依靠维修更换配件维持运行,难以满足工程要求。
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