机组运行时，大量灰尘和固体颗粒杂质由于重力、惯性扩散、接触阻留、静电等综合作用，灰尘沉降堆积在过滤元件上。
The unit operation, a solid particles of dust and impurities by gravity, inertia diffusion, contact resistance leave, static comprehensive effect, dust settlement piling up in filtering elements.
沉降在蔬菜上的灰尘也可以伤害植物和吃这种植物的动物。
The settling of dust on vegetation may also be harmful, both to the plant and to animals that eat the plant.
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