Hydraulic crawling is the main factor effect low speed moving performance of hydraulic cylinder.
液压爬行是影响液压缸低速运动性能的主要因素。
The legs of my cot sat in four cigarette tins filled with kerosene, which did discourage crawling insects, though it seemed to have little deterrent effect on the high-jumping fleas.
这样以来，那些小爬虫们确实无能为力了，但对跳高健将跳蚤们来说，似乎并没有多大的威慑力。
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