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to phrases
duct system
agric. 管系 (systema ducta)
avia. 风管网路
tech. 导管系统; 风道系统
telecom. 管道系统
duct system: 48 phrases in 8 subjects
Agriculture1
Anatomy1
Aviation2
Hydroelectric power stations1
Nautical1
Refrigeration14
Shipbuilding2
Technology26