连接于三脚架架头，能按铅垂方向直接指向地面标记点的可伸缩金属杆。
... Centering device 定中心装置 ; 扶正器 ; 对点器 centering rod 对中杆 centering ring 定心环 ; 准心环 ...
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通过对试验数据的分析得出了土中竖向应力、锚杆轴向应力、基坑侧向位移与施工过程间的变化关系。
The relationships from vertical soil pressure, axial stress of anchor, lateral displacement of foundation to construction process are got by test data analysis.
分析地铁限界中抗侧滚扭杆对车辆动态包络线的影响及车辆与站台间隙问题，并提出在标准中增加相关内容的建议。
This paper analyzes the influence of anti-rolling torsion bar to the vehicle dynamic envelope in metro gauges and the gap between vehicle and platform.
对回采巷道锚杆支护中几个应注意的问题进行了分析。
Finally some problems of bolt in gateway that should be noticed are analyzed.
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