2019新型冠状病毒(Covid-19,俗称武汉肺炎)疫情蔓延影响全世界,对于应否戴口罩,各国都有不同的看法和看法。那么戴口罩到底能不能有效阻止病毒的传播呢?
我们来听听德国粒子成像测速仪器公司(LaVision)怎么说?
该公司透过“纹影显像技术”(Schlieren)做了一项实验,并展示“戴口罩”和“不戴口罩”的粒子和气流变化,最后所获结果非常惊人。
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