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双层管
eng.geol. double tube
met. double-walled tube
oil duplex tube
tech. bimetallic tube
双层【串心】管
mining. double pipe
双层管
: 86 phrases in 14 subjects
Automobiles2
Chemistry1
Drilling4
Ecology1
Electronics7
Engineering geology18
General3
Metallurgy8
Mining2
Nautical1
Oil / petroleum8
Plastics4
Refrigeration1
Technology26

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