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| research aircraft | |||
| testing machine | |||
| machine for testing | |||
| experimental machine; tested machine | |||
| tester | |||
| test machine | |||
| probe aircraft (有实验设备的飞机); trier | |||
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| testing machine | |||
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| testing machine | |||
| 试验机: 1491 phrases in 52 subjects |
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