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prototype test stresses
tech.	испытания опытного образца; макетные испытания; испытание опытного образца; макетное испытание

prototype test : 16 phrases in 8 subjects

Apollo-Soyuz	1
Astronautics	3
Construction	1
Military	4
Quality control and standards	1
Space	1
Technology	2
Weapons of mass destruction	3