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信号地
xìnhào dì
hydroel.st.
signal earth
space
signal ground
信号地
:
89 phrases
in 19 subjects
Advertising
2
Air defense
2
Aviation
5
Communications
3
Construction
1
Earth sciences
3
Economy
1
Electronics
14
General
3
Geophysics
5
Information technology
7
Oil / petroleum
7
Project management
1
Radio
1
Rail transport
4
Space
4
Sports
1
Technology
19
Telecommunications
6
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