double-layer filter

基本解釋

The utility model has the advantages of effective filtering and washing combination, double-layer sieve filter, simple structure and high filtering quality.
本裝置過(guò)濾與沖洗有效結(jié)合、雙層篩濾、結(jié)構(gòu)簡(jiǎn)單、過(guò)濾質(zhì)量高、適用范圍廣。
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The face mask consists of double-layer non-woven cloth in which filter layer, nose bridge bar and face mask belt is set, or is made of multi-layer medical absorbent gauze.
口罩由雙層無(wú)紡布中間夾過(guò)濾層、鼻梁條和口罩帶構(gòu)成，或由多層醫(yī)用脫脂紗布經(jīng)縫制而成。