凤凰彩票

今天是2019年4月8日 星期一,歡迎光臨本站 

資訊動態

油氣潤滑系統設計介紹

油氣潤滑系統設計介紹
在機械設備中,兩個相對作用對運動的零部件表面在工作時會產生摩擦。當然,摩擦有時也是有利的。例如,我們的祖先就是利用了摩擦的原理發明了火。我們的生活也離不開摩擦。如果沒有鞋底和地面之間的摩擦,我們將寸步難移;沒有輪胎和道路之間的摩擦,汽車將無法行駛等等。但是在更多的情況下,摩擦是有害的,它是機械能損耗的罪魁禍首,其結果降...
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