活动
博客
市场
页面
更多的
December 28, 1895 (125 years ago): Wilhelm Röntgen publishes a paper detailing his discovery of a new type of radiation, which later will be known as x-rays. #backintime #otd #1800s #xray #medical #history
装载更多
您即将购买商品，是否要继续？
