Air quality - determination of the pm10 fraction of suspended particulate matter - reference method and field test procedure to demonstrate reference equivalence of measurement methods 空气质量.悬浮颗粒pm10系数测定.验证测量方法基准等效值证用参照法和野外检验法
Air quality - determination of the pm10 fraction of suspended particulate matter - reference method and field test procedure to demonstrate reference equivalence of measurement methods ; german version en 12341 : 1998 空气质量.悬浮颗粒物中pm10系数的测定.验证测量方法
Air quality . determination of the pm10 fraction of suspended particulate matter . reference method and field test procedure to demonstrate reference equivalence of measurement methods 空气质量.悬浮颗粒物的pm10分数的测定.验证测量方法参考等效值的参考方法和现场试验过程
Research has demonstrated that advective flow , which originates near the surface of the ocean where suspended particulate matter accumulates , transports some of that matter and water to the vents 研究显示大洋表面附近形成的对流潮将聚集的浮游颗粒物质和水输送到喷口处。
No acid rain has fallen in the region . the annual level of suspended particulate matter in the urban atmosphere averages 340 microgram / cubic meter a day , well within state standards 全区没有出现酸雨，城市大气中总悬浮微粒年日均值为340微克/立方米，大大好于国家大气环境质量的要求。
No acid rain has fallen in the region . the annual level of suspended particulate matter in the urban atmosphere averages 340 microgram per cubic meter a day , well within state standards 全区没有出现酸雨，城市大气中总悬浮微粒年日均值为340微克/立方米，大大好于国家大气环境质量的要求。
