mean dust concentration 平均粉尘浓度 ; 粉尘平均浓度
safe dust concentration 安全含尘浓度
measurement of dust concentration 粉尘浓度测定 ; 粉尘浓度测量
Coal mine dust concentration transducer 煤矿用粉尘浓度传感器
dust concentration of coalpit 煤矿粉尘浓度
outlet dust concentration 出口含尘浓度
dust concentration in ice cores 冰心中粉尘浓度
The foam dust control technology was applied in Zaozhuang Coal Mining Group Xinyuan 12,211 roadway head, the results showed that ,foam dust removal efficiency were 2.11 times and 1.72 times higher than water spray respectively, the new technology reduced dust concentration effectively, with great significance in dust control.
将该技术在枣庄矿业集团新安煤矿新源12211轨顺掘进工作面进行了应用,现场测试结果表明泡沫对全尘和呼吸性粉尘的降尘效率分别是水雾除尘的2.11倍和1.72倍,有效地降低了井下采掘工作面的粉尘浓度,取得显著的防尘效果。
参考来源 - 煤矿井下泡沫除尘理论与技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The seam water injection is an effective measure to control coal dust concentration.
煤层注水是降低矿井粉尘浓度的有效措施之一。
A piezoelectric-balance type PM-10 monitor used for measuring the inhalable dust concentration indoor has been developed.
本课题研制了一种应用压电天平原理，用于室内公共场所监测用的PM-10粉尘测定仪。
The dust concentration distribution on the electric field section in ESP is not uniform, this is one of reasons to produce secondary blowing dust.
电除尘器内电场断面烟尘浓度呈非均匀性分布，它是产生振打二次扬尘的重要原因之一。
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