It shows that the lubricant with nano-Cu additive can improve the lubricating performance and reduce wear.
试验结果表明：纳米铜添加剂可以有效地提高润滑性能，减小喷油泵的磨损。
The problem to improve the lubricating performance and to increase the contact strength are important objects in the studys of worm gearing.
改善润滑性能和提高接触强度是蜗杆传动研究的一个重要目的。
The problem to improve the lubricating performance and to increase the contact strength are important objects in the studys of worm gearing.
改善润滑性能和提高接触强度是蜗杆传动研究的一个重要目的。
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