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垂直管
avia. vertical tube
earth.sc. stand pipe
垂直管: 69 phrases in 17 subjects
Air defense1
Automobiles2
Aviation2
Business2
Electronics5
Engineering geology2
General2
Hydroelectric power stations2
Metallurgy3
Nautical3
Navigation2
Oil / petroleum5
Oil processing plants1
Project management1
Refrigeration3
Technology31
Textile industry2