gently inclined coal seam 中文意思是什麼
gently inclined coal seam
解釋
緩傾斜煤層-
Model test two - stage underground coal gasification in counter directions with gently inclined coal seam
煤炭地下氣化雙火源兩階段方法現場試驗研究 -
Testing methods of floor compressibilities for coal mining face under conditions of gently inclined seam
緩傾斜煤層採煤工作面底板抗壓入特性測定方法
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