矿井漏风
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coefficient of mine air leakage 矿井漏风系数
air leakage in mine 矿井漏风
external air leakage in mine 矿井外部漏风
·2,447,543篇论文数据，部分数据来源于NoteExpress
Retrograde ventilation is used for Wangjiazhai coal mine, both air leakage and ventilation resistance of the main shaft are largish.
王家寨煤矿为中央并列式通风，漏风量较大，主井通风阻力较大。
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