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预防修
railw. preventive maintenance and repair
预防 修
: 87 phrases in 22 subjects
Agriculture1
Automobiles3
Aviation11
Bridge construction1
Business11
Chemistry2
Earth sciences1
Economy6
Electronics4
Hydroelectric power stations2
Management2
Mechanics3
Metallurgy5
Oil / petroleum2
Rail transport2
Reliability4
Shipbuilding1
Space7
Technology14
Telecommunications2
United States1
Wind Energy2

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