...家安监总局职业安全卫生研究所 22 、根据粉尘在人呼吸道沉降的部位分类 国家安监总局职业安全卫生研究所 (1)、总粉尘(total dust): "总粉尘":理论上讲,真正的总粉尘指漂浮 在空气中的所有粉尘颗粒。
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total dust collection efficiency 总粉尘除尘效率
cumulative total dust exposure 以累积总粉尘接触量
total dust exposure 总粉尘量
total dust concentration 总粉尘浓度
total dust concentrations 总粉尘浓度
The result showed that the natural dustfall accounted for 54% of the total dust amount yearly.
经分析，兰州城区自然降尘量占年降尘量的54%。
Methods The concentration of total dust, respirable dust and the dust dispersivity were measured at same time.
方法对工作场所空气中某种粉尘进行总尘浓度、呼尘浓度、分散度测定。
They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half.
经历六年的时间，他们发现，种植三排树木就能减少总计超过一半的尘埃和氨。
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