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operation and maintenance | |||
operational and maintenance |
操作和维修 : 28 phrases in 10 subjects |
Air defense | 1 |
Aviation | 12 |
Business | 2 |
Economy | 5 |
Electronics | 1 |
Mechanics | 1 |
Project management | 2 |
Shipbuilding | 1 |
Technology | 2 |
Telecommunications | 1 |