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operation record | |||
charge book |
作业记录 : 16 phrases in 10 subjects |
Aviation | 2 |
Business | 1 |
Earth sciences | 1 |
Economy | 1 |
Electronics | 3 |
Explosives and Explosive Ordnance Disposal | 2 |
Information technology | 1 |
Metallurgy | 1 |
Technology | 3 |
Telecommunications | 1 |