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on-orbit assembly
| maintenance and service
| on-orbit assembly | |
| space | 在轨组装 |
| maintenance and service | |
| auto. | 维护和修理; 维修 |
| tech. | 维修与使用; 保养与维修 |
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| 在轨组装 | |||
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on-orbit assembly, maintenance and service : 5 phrases in 2 subjects |
| Aviation | 1 |
| Space | 4 |
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