该装置是一种提高局部小环境洁净度等级的空气净化产品，利用净化单元可制作简易洁净工作台、净层流罩、净传递柜和洁净存衣柜。

BSU is small HEPA filter and fan unit, which is used for many purposes by users plan such as simple clean bench, clean booth , clean passbox& clean garman stocker etc.

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VS1等级表示其净度高于VS2等级。

VS1 denotes a higher clarity grade than VS2.

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SI1等级表示其净度高于SI2等级。

SI1 denotes a higher clarity grade than SI2.

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