大气飘尘 air particulate 飘尘浓度 concentration of floating dust; concentration of flwating dust ..
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大气飘尘浓度测定方法 determination of the concentration of airborne particulate matters
利用激光单缝衍射技术测量大气飘尘的真比重，具有精度高和测试方法简便易行的特点。
The method to determine the real specific gravity of atmospheric dust by using laser slitdiffraction technology has high precision and is easy to handle.
本文收集了兰州市区和郊区在取暖期和非取暖期的大气飘尘样品和汽车尾气及烟尘样品。
In this work, samples of airborne particulates, vent gas and smog dust during heating and non-heating seasons were collected in the urban and suburban areas of Lanzhou.
经过分析和比较表明，该地区总悬浮颗粒物(tsp)和飘尘对大气的污染相当严重，飘尘占tsp的比例偏大，飘尘的颗粒分布在冬季和春季相似。
The results indicate that the air of the district is contaminated seriously by the total suspended particles (TSP) and the floating dust.
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