北京快乐8

防霾鼻罩10天变黑 显微镜下雾霾长这样

2017-1-4 12:57:08

通过台式扫描电子显微镜,观察近期使用后的防霾鼻罩滤芯上采集的雾霾颗粒,以及分析雾霾颗粒里面含有的各种元素。

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