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美国:国家卫生局局长手把手教自制口罩 新泽西会议中心建野战医院
美国卫生局局长杰罗姆·亚当斯博士在视频中演示了如何用家用物品制作一个简易的布口罩。同时，新泽西会议该中心改建成配备有500个床位野战医院。
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