...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
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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