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to phrases
一次线
yīcìxiàn
tech.
primary line
一 次 线
:
41 phrases
in 17 subjects
Agriculture
2
Air defense
1
Aviation
1
Bridge construction
1
Business
1
Dentistry
1
Electronics
4
General
3
Genetics
1
Mathematics
3
Metallurgy
4
Mountaineering
1
Oil / petroleum
2
Shipbuilding
1
Technology
11
Telecommunications
2
Textile industry
2
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