求翻译：大气颗粒物污染严重时，会导致大流量气溶胶采样器滤材堵塞，使样品的采样体积不足。滤材联用技术与分级采样技术是目前技术条件下延缓滤材堵塞的两种重要方法。本文选取了4种粗效滤材，在实验室现有条件下，模拟发生沙尘期与采暖期的大气气溶胶，比较了这两种方法在两种不同污染情况下的使用情况。是什么意思？

Atmospheric particulate pollution is serious, it will lead to high flow filter clogging aerosol sampler, the sample is less than the sampling volume. Filter combined with sampling techniques and classification technology is currently under technical conditions are two important anti-clogging filter

Atmospheric particulate pollution is serious, would lead to large flow aerosol samplers plugged filters, so that samples of insufficient sample size. filters used in conjunction with hierarchical sampling technology technology technology is currently under the conditions of stay plug filters two imp

When atmospheric particles pollution serious, can cause the great current capacity aerosol sampling instrument to filter the material jamming, causes the sample the sampling volume to be insufficient.Filters the material association is under at present engineering factor delays with technical and th

When serious pollution of atmospheric particles, aerosol sampler can lead to large flow filter blockage, insufficient sample size of the sample. Filter technology and delay under multi-stage sampling technology is technology filter blockage in two important ways. This article has selected 4 low effi