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.

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。

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Supported by modern conveyances, spatial diffusion of culture is becoming easier and easier. But, cross-cultural contact which based on tourism brings huge challenge to local culture with it.

在现代交通工具的支持下，使得文化的扩散空前容易，也使得以旅游为载体的跨文化交流给旅游目的地居民带来了前所未有的冲击。

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