soft seams 中文意思是什麼
soft seams
解釋
磨耗的帆布縫線-
Analysis of the rational mining process with caving method for the extremely unstable coal seams soft seam, soft roof and soft floor
三軟極不穩定煤層合理采放煤工藝分析 -
Probe and practice of supporting technology with shotcrete and bolting wire mesh for large - section coal roadways in soft seams between soft roof and soft floor
三軟煤層大斷面巷道錨網支護技術探索與實踐 -
Study on stability of the end face in ultra soft and thick seams using fully mechanized sublevel caving method
極軟厚煤層綜放開采端面穩定性研究
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