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prior operation | |||
preoperation |
预运行 : 22 phrases in 10 subjects |
Automobiles | 1 |
Aviation | 1 |
Earth sciences | 7 |
Electronics | 4 |
General | 1 |
Hydroelectric power stations | 1 |
Nuclear and fusion power | 1 |
Nuclear physics | 1 |
Project management | 1 |
Technology | 4 |