This paper discusses the mechanism of self driving vibration in the machine tool feeding system.
讨论了机床进给系统中因运动部件移动速度较低，因而产生爬行现象的自激振动机理。
This paper discusses the mechanism of self driving vibration in the machine tool feeding system. The moving parts with lower speed lead to the crawling phenomenon.
讨论了机床进给系统中因运动部件移动速度较低，因而产生爬行现象的自激振动机理。
Nutrients in the ponds did not increase with the growth of fish, feeding and discharge, which indicated that the self-cleaning mechanism still support the cultured density.
在养殖周期内密养池塘中的营养物质并没有随鱼的生长、摄食量和排泄量的增加而逐渐增加，说明池塘的自净机制可以支持当前的放养量。
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