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research, development and engineering | |
gen. | 研究託发与工程学 |
avia. | 研究、发展和工程 |
earth.sc. | 研究、开发与工程 |
mil., air.def. | 研究、研制与工程 |
expenses | |
interntl.trade. | 开支; 费用; 杂费 |
research, development and engineering: 18 phrases in 7 subjects |
Aviation | 4 |
Business | 1 |
Earth sciences | 3 |
Electronics | 4 |
General | 2 |
Space | 3 |
United States | 1 |