No. 84 - Cellulose Thimbles: Suitable for Soxhlet type extractions or dust sampling.

第84号-纤维素套环：对于索氏类型拔牙或粉尘采样合适。

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

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。

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Quality control methods on dust sampling and weighting process of filtering cartridge are pointed out based on dust monitoring practices and comparative researches.

通过对烟尘测试的实践和对比研究，提出了烟尘测试中滤简的称量过程和烟尘采样过程的质量控制和方法。

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More extensive sampling of the dust has not found any evidence of thermite or explosives, says a report from the US Geological Survey and another from RJ Lee.

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