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| 检查窗 | |||
| 瞭望窗 | |||
| 观测窗口 | |||
| 视察窗 | |||
| 观察窗; 观测孔 | |||
| 观察孔 | |||
| 观测窗 | |||
| English thesaurus | |||
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| obw | |||
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observation window : 2 phrases in 2 subjects |
| Aviation | 1 |
| Rail transport | 1 |
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