advanced development〔名词〕进展性研制详细»
advanced development〔名词〕样品试制,样机试制详细»
advanced development〔名词〕样机研制,研制样机试验详细»
advanced development〔名词〕试制,试验研究详细»
advanced development〔名词〕试制详细»
advanced development〔名词〕样机研制,研制样机试验详细»
试验研究experimental investigation详细»
试验研究advanced development;experimental investigation;experimental study详细»