... pilot servomotor ==> 中间接力器,引导伺服阀 pilot shaft ==> 导井 pilot shorting relay ==> 辅助导线短路继电器 ...
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应用反井钻机开挖导井可达到快速安全的效果。
Application of inverse well drill will permit quick and safe excavation of pilot shaft.
水电工程竖井特别是高竖井开挖，主要难点体现在竖井导井开挖的速度上。
The excavation speed of pilot shaft is one of the key difficulties for the excavation of shaft, high ones in special, of hydropower works.
在闸门井导井被岩体完全封堵的情况下，为确保后期刷帮及衬砌安全，采用锚杆和砼结合对闸门井进行锁口。
In the case that the pilot bore of the lock gate shaft was fully blocked by the rock mass, anchors have been combined with concrete to ensure the safety of subsequent side clearing and lining.
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