bump seam 中文意思是什麼
bump seam
解釋
襯布縫頭橫檔痕-
Analysis on danger of pressure bump when fully mechanized sublevel caving mining face passed through terminal mining line of top slicing seam
綜放面過上分層終采線沖擊地壓危險性分析 -
The practice and recognition of preventing the seam pressure bump
煤體沖擊地壓防治的實踐與認識
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