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navigation satellite system
geophys. 卫星导航系统
space 导航卫星系统
navigation satellite system: 70 phrases in 16 subjects
Air defense1
Automobiles1
Aviation2
Desert science1
Earth sciences4
Electronics4
Information technology1
Nautical5
Navigation3
Oil / petroleum4
Shipbuilding5
Space28
Technology7
Telecommunications1
United Nations1
United States2

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