Department of Defence
| Research and Engineering
| Department of Defence | |
| oil | 国防部 |
| research and engineering | |
| gen. | 研究与设计 |
| busin. | 研究与工程 |
| earth.sc. | 研究和工程 |
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| 美国国防部 | |||
| 国防部 | |||
| English thesaurus | |||
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| DD | |||
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Department of Defence : 7 phrases in 4 subjects |
| Aviation | 3 |
| Earth sciences | 1 |
| Electronics | 2 |
| Space | 1 |