In general, fine dust than coarse dust to take the filter speed is lower, the smaller the dust collector is generally higher than the large environmental protection dust removal equipment.

一般，细尘埃比粗尘埃取的过滤速度要低些，较小的除尘器一般选用比大环保除尘设备高的过滤速度。

youdao

Yellow bands—larger, coarse particles—around the Middle East, North Africa, and western North America likely indicate dust and sand storms as the northern hemisphere reaches the driest time of year.

黄色地带，也就是分布着较大的较粗糙粒子的中东地区、北非以及北美西部，随着北半球到达一年中最干旱的季节，很可能预示着有沙尘暴灾害。

youdao

The main transformed parts included water cooling wall, burner, coal saver, dust removing equipment, air suction machine and coarse powder separator.

主要改造部分有：水冷壁、燃烧器、省煤器、除尘设备、吸风机和粗粉分离器等。

youdao