For the causes that result in the crawling malfunction of hydraulic machine are very complicated and invisibility, so being always a difficulty of machine maintenance.
造成液压机床爬行故障的原因很复杂，液压爬行故障又具有很强的隐蔽性，所以一直是机床维修的一大难点。
Key directions: first, crawling, the key box excavation at the leak, cloaked in bright lights atop the machine according to the police box will be the key thrown away soil.
第一关：方向键爬，空格键挖掘，等到放风时间，趁着机器警察头顶灯不亮时按空格键将土扔掉。
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。
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