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研制试验
avia. development test (初样阶段的)
busin. research and development test
el. development's test
space development test; developmental test
tech. developing test; researching test
研制开发试验
auto. development test
研制试验: 65 phrases in 12 subjects
Air defense1
Automobiles1
Aviation30
Business2
Commerce1
Earth sciences5
Economy1
Electronics1
General1
Space20
Technology1
United States1