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主保护
el.
basic protection
hydroel.st.
main protection
;
primary protection
主保护:
69 phrases
in 24 subjects
Automobiles
1
Business
2
China
2
Commerce
3
Desert science
1
Earth sciences
1
Ecology
2
Economy
9
Electronics
2
Environment
1
Finances
15
General
1
Hydroelectric power stations
5
Information technology
1
International trade
6
Life sciences
1
Marketing
1
Metallurgy
1
Oil / petroleum
1
Project management
1
Rail transport
2
Technology
8
Telecommunications
1
United Nations
1
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