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выборочные испытания stresses
el.mach.	抽样检验
выборочное испытание
el.	抽样试验
el.mach.	样本试验; 样品试验; 取样试验; 选样试验
oil.proc.	抽查试验
tech.	选择试验; 抽査验; 抽查; 抽验

выборочные испытания: 4 phrases in 3 subjects

Aviation	1
Chemistry	1
Technology	2