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low coal seam

low coal seam

夹有薄煤层（low coal seam）和斑脱岩（即膨润土bentonite）。含煤地层变位轻微，倾角*很少超过20°。

在线英语词典,英文翻译,科技词... ... 免误报： avoid error alarm 煤薄层： low coal seam 镁尾水： magnesium nitrate tail water ...

Research and Practice of Backstopping Techniques Adopted in 9# Low Coal Seam of Jinpushan Coal Mine