chute blasting 中文意思是什麼
chute blasting
解釋
溜井爆破-
Construction technology for completion of coal chute in a single stage by longhole blasting
溜煤眼深孔爆破一次成井施工技術 -
Practice on one blasting construction for deep vertical bore hole of coal chute
溜煤立眼深孔一次起爆施工實踐
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