Filtration coefficient ratio depends mainly on the air dust and the content of solid particles.
过滤系数比值主要取决于空气中灰尘和固体颗粒的含量。
Respiratory dust content in air I creases with raising of dust concentration.
说明空气中呼吸性粉尘的含量随着粉尘浓度的增高而增加。
Through collecting, dehydration, conditioned test and anti-jamming test of the sample, the content of trace urea dust in the air can be exactly determined by way of such technique.
通过对样品的采集、洗脱、消化水解、条件试验及抗干扰试验，证实本法能准确测定空气中微量尿素尘的含量。
Dust sample in blast pipe was collected when centralized air ventilation system was off, the total content of the bacterium and fungus was examined.
集中空调关闭期间，采集集中空调通风系统送风管内的积尘样品，检测其细菌总数、真菌总数；
Dust sample in blast pipe was collected when centralized air ventilation system was off, the total content of the bacterium and fungus was examined.
集中空调关闭期间，采集集中空调通风系统送风管内的积尘样品，检测其细菌总数、真菌总数；
应用推荐