英德
有道
百度
谷歌
图片
维基
百科
垂球 [chuí qiú]
plummet
plumb
plumb
- 随着温度的沥青软化和垂在球的重量。
With increasing temperature the bitumen softens and sags under the weight of the ball. - 场地中间的绳子，增加无数短绳子向地面垂下，球从绳子下面经过时，可以明显地发觉。
Site the middle of the rope, an increase of numerous short rope dropped to the ground, the ball from the rope after the following can be found obviously. - 就测量仪器的垂球对中、光学对中、激光对中和强制对中的原理、操作方法和对中精度指标进行对比研究，并对光学对中和激光对中的操作方法从原理上给出了证明。
A comparison study in principle, operating method and centering precision index of the plumb centering, optical centering, laser centering and forcing centering was conducted in this paper.
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