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test ring
el.mach. 试环
hydroel.st. 环筒
oil 检验环
tech. 试验环线
test ring: 55 phrases in 18 subjects
Animal husbandry1
Chemistry2
Construction1
Drilling2
Electric machinery1
Electronics1
Engineering geology4
Food industry1
Hydroelectric power stations2
Laboratory equipment1
Life sciences1
Metallurgy3
Nursing1
Oil / petroleum2
Plastics6
Polymers1
Reproductive biology1
Technology24

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