mine air meaning in Chinese

矿井空气
矿井内空气
矿内空气

Technology way of governing small mine air leak
治理小井漏风的技术措施
Brief analysis on test of reversing air current with mine air draft
矿井利用风道反风试验浅析
Determination of leakage rate and specific resistance for mine air duct
矿用风筒漏风率和风阻的测定方法
The application of frequency control technology in mine air compressor
变频调速技术在矿山空气压缩机中的应用
Influence of natural wind in winter to mine air ventilation and its treatment
矿井反风演习期间参数变化对通风的影响

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