... jacketing 套 jacking bolt 顶举螺旋 jacking engine 盘车机 ...
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... jacking lock 动作筒锁 jacking bolt 顶举螺栓 jacking point 千斤顶支承点...
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Lower guide bearing jacking bolt 下导瓦调整丝顶
·2,447,543篇论文数据,部分数据来源于NoteExpress
The testing methods on extension of anchor bolt are introduced. The whole deformations of normal bolts under pretensioning and its effect on the jacking of surrounding rock are pointed out.
通过对锚杆延伸性能测试方法的介绍,计算出了几种常用锚杆在预紧加固条件下的整体变形量,并结合井下实用情况指出不同性能锚杆对围岩加固的影响。
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