英语文章,ocean占地球的百分之71,释放更多的氧气
The vast ocean occupies 71% of the earth's surface area, deep bottom rich oil reserves, accumulation of numerous manganese group and other resources attract some I developed countries for Marine development deep submersible technology is a necessary means for Marine development, it is by deep submersible, work ship (water support ship) and land base composed of a complete system, deep submersible is the key part.
Jiaolong manned submersible is a deep submersible designed by China. The main technical indicators of Jiaolong manned submersible include: 8.2 m width and height x3.0 m x3.4 m; air mass exceeding 22 tons; 220 kg (excluding crew mass); maximum diving depth of 7000 m; speed of 25 sections, cruise 1 section; crew of 3 people; life support, normal: 3x12 people, emergency: 3x84 people, normal underwater working time: 12 hours.
China is after the United States, France, Russia, Japan, after the world's fifth master deep manned deep diving technology in the global manned submersible, jiaolong belongs to the first echelon "dragon" manned submersible main technical characteristics: in the world type
of manned submersible has the maximum depth of 7000 meters, which means that the submersible can be used in 99.8% of the world's ocean area.
It provides a reliable guarantee for the submersible to complete high-precision operation tasks, advanced underwater acoustic communication and submarine microtopography detection capability, high-speed image and voice transmission to detect the seabed small target, and various high-performance operation tools to ensure the fidelity sampling and submersible drilling core and other complex tasks under special Marine environment or seabed geological conditions.
>submarine

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