国产精品永久免费视频- 无码精品A∨在线观看中文 -热re99久久精品国产99热-国产成人久久777777

Home / China / Society

Chinese farmer granted patent for submarine

(chinadaily.com.cn) Updated: 2016-04-28 14:34

Chinese farmer granted patent for submarine

Zhang Shengwu displays a patent he won from the State Intellectual Property Office, for creating a new submarine at home. [Photo/IC]

Tags
Most Popular
...