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to phrases
optical section
avia.
光纤段
desert.
光切面
tech.
光学切面
;
光学截面
optic section
tech.
光学切面
;
光学截面
;
光切面
optical section
:
23 phrases
in 9 subjects
Air defense
1
Aviation
2
Communications
4
Electronics
5
Hydroelectric power stations
1
Information technology
3
Rail transport
1
Space
1
Technology
5
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