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hollow beam
bridg.constr. 空腹梁
construct. 空心〔环状〕射束
met. 空心束
oil 空心梁
tech. 预制钢筋混凝土空心梁; 管梁; 空心射束; 空心电子注
hollow beam: 21 phrases in 4 subjects
Architecture1
Electronics2
Space1
Technology17