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5 单元码
tech.
five unit code
5单元码
busin.
five unit code
单元码
oil
element number
单 元 码
:
44 phrases
in 10 subjects
Air defense
1
Aviation
1
Communications
3
Electronics
20
Information technology
4
Multimedia
1
Rail transport
1
Space
6
Technology
6
Wind Energy
1
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