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空中交通管制勤务
| 规则
| 空中交通管制勤务 | |
| avia. | air traffic control service |
| 规则 | |
| chem. | rule |
| econ. | precept; Canon; rule |
| el. | code |
| interntl.trade. | propriety; regulations |
| met. | code |
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| air traffic control service | |||
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空中交通管制勤务 : 5 phrases in 1 subject |
| Aviation | 5 |
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