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符号、代号
avia.
designator
符 号 、代号:
57 phrases
in 19 subjects
Aviation
3
Chemistry
1
Commerce
1
Computers
1
Construction
1
Earth sciences
1
Electronics
7
Engineering geology
1
General
6
Geography
1
Information technology
9
International trade
1
Mathematics
1
Metallurgy
2
Project management
1
Space
1
Technology
17
Telecommunications
1
Textile industry
1
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