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active layer
bridg.constr. 活动层; 融冻层
construct. 活土〔作用,融冻〕层
eng.geol. 冻土活动层; 冻融层
geol. 活性层
met. 有效层
tech. 激活层; 活土层; 活化层; 作用层; 冻胀土层; 地面土层变动层; 充气活化层
active layer: 17 phrases in 5 subjects
Bridge construction1
Earth sciences1
Electronics13
Explosives and Explosive Ordnance Disposal1
Technology1