...位移工作点 operative mark of vertical displacement 垂直位移观测（沉陷观测，沉降观测） vertical displacement observation 垂直位移基点 datum mark of vertical displacement ..
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它的优点是能对温度所产生的标点变形进行修正，从而提高垂直位移观测精度，控制钻孔质量才能保证双金属标安装的准确性。
System advantage is that it can amend mark point distortion, thus, accurate observation of vertical displacement can be got. Bimetal mark install veracity depends on quality of digging hole.
在高层建筑及地质敏感地区建筑物施工过程中，对施工建筑物及其周边地区建筑物进行垂直位移监测即沉降观测工作，是对建筑物施工质量控制的一个重要手段。
In the construction of high-rise buildings and geological sensitive areas, it's important to make settlement observation for buildings and nearby ones so as to control the quality of construction.
大坝蓄水运行期间的观测结果显示大坝的变形符合一般的变形规律。坝体的垂直位移变形值在设计要求之内，说明倒垂线系统安装是成功的。
Moreover, it is successful to use the inverted vertical system for the observation of dams, and the installation method as mentioned here is also successful.
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