dilution of dust air
含尘空气的冲淡
The dilution air should be taken from the internal cabin.
稀释空气在环境舱内部取气。
Due to dilution in the air, outdoor radon levels are usually very low.
鉴于在空气中得稀释，室外得氡水平通常很低。
Finally a calculating method for air supply in mining area by dilution equation was proposed.
最后给出了运用稀释方程计算采场供风量得方法。
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