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降氧 jiàngyǎng
gen. deoxydization
refrig. oxygen pull-down
降 氧: 49 phrases in 14 subjects
Agriculture3
Animal husbandry1
Aviation2
Chemistry4
Earth sciences1
Explosives and Explosive Ordnance Disposal1
General1
Metallurgy2
Perfume1
Plastics6
Polymers2
Space5
Technology16
Water resources4