flush hole 中文意思是什麼
flush hole
解釋
蒙皮孔-
9 where old fixed protection cannot be removed the old protection should be cut off flush with the rock or ( preferably ) sheared off below the rock surface and the hole then plugged
9當老舊的固定支點無法移除時,應將其切除,使其與巖面齊平;或最好在切除時,使其低於巖面,再將洞口補平。
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