欧美日韩性大香蕉|精品无码成人视频|永久久久久久久久|日韩加勒比偷拍网|婷婷伊人久久蜜桃|亚洲理论中文字幕|中文无码黄色Av|三级一区二区三区|超碰在线精品专区|国语对白一级A片

Home

First 3D-printed artificial axis in China

Updated: 2014-08-22 07:13 (Agencies)
Comments
First 3D-printed artificial axis in China
Chinese doctor Liu Zhongjun gives an explanation of the 3D-printed artificial axis he has successfully implanted into the spine of a bone cancer patient at Peking University Third Hospital in Beijing, August 14, 2014. [Photo/Agencies] 

Related Stories
Most Popular
...