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to phrases
保护比
oil
protection ratio
保护比[率]
space
protection ratio
保护比
:
30 phrases
in 13 subjects
Air defense
2
Earth sciences
3
Electric machinery
3
Electricity generation
2
Electronics
4
General
1
Hydroelectric power stations
6
Metallurgy
1
Name of organization
1
Securities
1
Shipbuilding
1
Sports
1
Technology
4
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