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浓度比
met. ratio of concentration
nautic., tech. concentration ratio
tech. density ratio
浓 度比
: 45 phrases in 17 subjects
Animal husbandry4
Automobiles2
Chemistry7
Construction1
Earth sciences5
Environment1
Explosives and Explosive Ordnance Disposal1
General1
Metallurgy2
Oil / petroleum4
Plastics2
Polymers2
Space1
Sports1
Technology9
Textile industry1
Water resources1

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