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预防修
railw.
preventive maintenance and repair
预 防 修
:
87 phrases
in 22 subjects
Agriculture
1
Automobiles
3
Aviation
11
Bridge construction
1
Business
11
Chemistry
2
Earth sciences
1
Economy
6
Electronics
4
Hydroelectric power stations
2
Management
2
Mechanics
3
Metallurgy
5
Oil / petroleum
2
Rail transport
2
Reliability
4
Shipbuilding
1
Space
7
Technology
14
Telecommunications
2
United States
1
Wind Energy
2
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