但外操工在聚丙烯粉尘取样口取样瞬间工人操作位空气中丙烯最高浓度超过有关标准的职业接触限值11倍。

But the maximum concentration of propylene during the sampling moment at the polypropylene dust sampling window exceeded 11 times relative standards.

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提出了能直接测量烟尘和粉尘排放浓度和粒径大小的激光监测技术，具有实时快速、非接触、在线、无需取样和连续测量的优点。

A laser based technique is proposed which is able to measure and supervise the mass concentration and particle size of smoke and dust in emissions.

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