... 孢粉统计学；孢粉统计 spore-pollen statistics 标准粉体 standard dust 氮化钛粉体 titanium nitride nano-powder ...
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2.3标准尘针对自 然尘粒径和浓度不稳定及环境香烟烟雾粒径范围窄， 标准尘（standard dust）应运而生。 标准尘是指选择规定地区的降尘， 筛选其中主要成分并掺入规定量的细炭黑和短纤维混合而成。
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Test Dust Standard Sample 试验粉尘标准样品
standard silicon dust 标准石英粉尘
standard of dust quality 粉尘合格率
standard uranium ore dust 标准铀矿样粉
They are much more effective than the standard surgical masks or dust masks that are sometimes used by builders.
它们比标准的外科口罩或有时建筑工人使用的防尘口罩要有效得多。
The EPA tagged the county at the end of 2006, after pollution from particulates - known to experts as "fugitive dust" - exceeded the emissions standard for two years running.
环保署选中2006年底选中该镇，当地两年来微粒污染(专家称之为“浮沉”)超过了排放标准。
Clean, no dust, without stain, without oily be soiled, customer acceptance, signed for the standard.
洁净、无灰尘、无污点、无油渍，以客户验收、签字为标准。
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