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混凝土保护层 hùnníngtǔ bǎohùcéng
bridg.constr. concrete protection course
hydroel.st. concrete cover
tech. concrete covering; concrete protection layer; protective concrete layer
混凝土保护
tech. protective coat of concrete
混凝土保 护 层: 10 phrases in 3 subjects
Bridge construction3
Rail transport1
Technology6