一天早上，他去跑步，不过是机械地向前跑。
泵的特点取消了泵的机械密封，完全消除开机械密封离心泵不可避免的跑、冒、滴、漏之弊病，是无泄漏工场的最佳选择。
Pump Features Cancellation of the pump mechanical seal, pump mechanical seals eliminate the inevitable run, run, drip, drain the drawbacks, there is no leakage of the plant the best choice.
对比分析还得出机械研磨与跑合有相似的作用，而研磨的作用更为明显。
It also shows that the effect of polishing is similar to and more obvious than...
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