“Ordinary protective masks”的概念、定义、翻译、参考文献-科学参考

单词	Ordinary protective masks
释义	Ordinary protective masks Encyclopedia 工学产业用纺织品释 Ordinary protective masks日常防护口罩日常环境中，普通人群用于阻隔飞沫、花粉、柳絮、微生物等颗粒物传播，阻隔鼻腔或口腔呼出或喷出污染物所佩戴的民用卫生口罩。
随便看	first-order aberration first order and second order phase transitions of superconductor first-order arithmetic first-order characteristic model based adaptive control first order circuit first order coherence first-order coherence first-order derivative first-order design first-order difference first-order differential first-order differential equation first-order efficiency first-order efficient estimator first-order equation first-order formula first-order functional calculus first-order hold first order induction schema first-order language first order logic first-order logic first-order memristor first-order model theory first-order necessary condition

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