hinges on arch bridges
... that hinges on arch bridges were introduced in 1858 and remain popular in modern civil engineering?
... that <b id="mwBjA"><a href="./Hinged_arch_bridge" id="mwBjE" rel="mw:WikiLink" title="Hinged arch bridge">hinges on arch bridges</a></b> were introduced in 1858 and remain popular in modern civil engineering?