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to phrases
观察系统
tech.
observing system
;
surveillance system
;
viewing system
textile
visual review system
观察 系统
:
52 phrases
in 16 subjects
Air defense
1
Athletics
1
Aviation
19
Business
1
Cartography
1
Earth sciences
1
Electronics
4
General
1
Geophysics
2
Metallurgy
1
Name of organization
5
Nautical
1
Space
2
Technology
10
Thermal Energy
1
United Nations
1
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