bottom drift 中文意思是什麼
bottom drift
解釋
海底漂移-
Application of caving mining technology with bottom under condition of flat dipping mid - thick body and unstable rock caused the most of trench and bottom drift, located in abutment, to be destroyed and low recovery in south area, xishimen iron mine
摘要在緩傾斜中厚礦體底板巖性不穩固的條件下,採用有底柱崩落法,由於電耙道大多處于空區邊部應力集中的部位,致使塹溝及底部結構巷道破壞嚴重而使回收率極低,採用無底柱崩落卸壓則可有效解決上述難題。 -
I started across to the town from a little below the ferry - landing, and the drift of the current fetched me in at the bottom of the town
天黑以後,我便坐劃子前往伊利諾斯州的河岸那邊。我在渡口下面不遠處朝鎮子劃去。水流把我帶到了鎮梢頭。 -
Analysis of influence factors on the convergence of stoping drift in sublevel caving method without bottom structure
無底柱分段崩落法回採巷道收斂的影響因素分析
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