China's manned submersible to begin trial by 2020
China became the third country after Japan and the US to build submersibles capable of reaching depths in excess of 10,000 metres,
Nov 28, 2017, 20:22 PM IST
China became the third country after Japan and the US to build submersibles capable of reaching depths in excess of 10,000 metres,
Nov 28, 2017, 20:22 PM IST