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two-hinged arch
bridg.constr. 二養拱; 两铰拱
el. 双較拱
hydroel.st. 双铰拱
tech. 二铁拱; 双铁拱
two hinged arch
archit. 双铉拱
bridg.constr. 双铰拱
tech. 二铰拱; 两铰拱
two-hinged arch: 8 phrases in 4 subjects
Bridge construction3
Electronics1
Rail transport1
Technology3