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双铰抛物线拱
archit.
double-hinged parabolic arch
(形梁)
;
double-hinged parabolic arched girder
(形梁)
bridg.constr.
two-hinge parabolic arch
;
double-hinged parabolic arch
双铰抛物线拱
:
12 phrases
in 1 subject
Technology
12
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