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to phrases
valve action
el. 阀动作
tech. 整流作用; 活门作用; 阀作用
valve action
: 37 phrases in 16 subjects
Agriculture1
Automobiles1
Aviation1
Chemistry1
Compressors2
Construction1
Electronics2
Hydroelectric power stations4
Metallurgy2
Nautical1
Oil / petroleum1
Rail transport3
Refrigeration1
Shipbuilding1
Space1
Technology14

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