A chemical dust reducing method for the polyacrylamide powder is recommended.

介绍了一种聚丙烯酰胺粉末降尘技术。

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Electrostatic dust, strong oil and chemical dust adsorption ability, long time to form a layer of solid transport membrane.

静电对尘埃、油污和化学粉尘吸附才能很强，时刻长了构成一层坚固的交通膜。

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The 'gold' pits isn't likely to be ferried back to Earth, though - scientists remain unsure of the chemical composition of the yelllow, shimmering dust that lines the pit walls every 'summer'.

可是那些在凹点的金线不太可能被带回地球，所以科学家还不能确定这在每个“夏天”都在凹点排成线而且发光的黄色灰尘的化学成分。

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Miners and chemical workers are at risk of COPD from breathing dust and harmful chemicals.

VOA: special.2010.06.23

Miners and workers in chemical industries also are vulnerable because of their exposure to dust, harmful chemicals and fumes.

VOA: standard.2010.06.21

In spite of renewed calls for regulatory measures, OSHA's Mr. Barab said it will be years before the agency settles on a new combustible-dust standard, a key regulatory measure recommended by the U.S. Chemical Safety Board, a separate government agency.

WSJ: Imperial Sugar to Pay Fines in Deadly Georgia Explosion Case