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保护度
oil
degree of protection
保护度:
179 phrases
in 26 subjects
Agriculture
1
Air defense
2
Automobiles
1
Aviation
2
Bridge construction
6
Business
7
Chemistry
1
China
6
Commerce
3
Drilling
1
Economy
3
Electronics
6
Finances
1
General
2
Hydroelectric power stations
3
International trade
6
Metallurgy
104
Mountaineering
1
Name of organization
1
Nautical
1
Navigation
2
Oil / petroleum
4
Rail transport
1
Securities
2
Technology
9
Textile industry
3
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