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Engineering and Development
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design, development, test and engineering
设计、研制、试验和工程
engineering and development
工程和研制［研发］
engineering development and demonstration
工程研制和演示验证
research and development engineering ［evaluation]
研究与发展工程［鉴定］
research, development and engineering
研究、开发与工程设计
research, development, test and engineering
研究、开发、试验和工程
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