emergency shaft 中文意思是什麼
emergency shaft
解釋
備用井-
Choosing and application of the emergency ventilation plan during repairing air shaft
風井井筒修復期間應急通風方案的選擇與實施 -
Selection and installation of submarine pump in inclined shaft emergency draining
斜井搶險排水中潛水電泵的配置及安裝 -
Exploration of emergency aid system in shaft
礦井應急救援體系初探
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