... Air filtering installations 空气过滤设备 air filtering mask 释义空气过滤面罩 air filtering system 空气滤清系统 ...
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When people buy a mask, , followed by effectiveness in filtering polluted air , price and design , said the survey.
教育不许，人们在购买口罩时，首先考虑的讨论大开大合度，其次讨论防霾功效、价格及外观设计。
With HEPA filtration products as an example, it is used in the automobile air filtering, diesel oil filtering and the mask with 99% permeability.
以技术产品HEPA过滤产品为例：用于汽车空气进入过滤和柴油过滤，以及消耗产品具有99%渗透效率的口罩。
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