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Concrete arches
Concrete arches. Built in 12 hours, by 65 men, 39 ft. 4 in. span, 6ft. 6 3/4 in. rise of arch. Cost in Switzerland, complete, about $600. Abstracts of Papers.
Concrete arches
Concrete arches. Built in 12 hours, by 65 men, 39 ft. 4 in. span, 6ft. 6 3/4 in. rise of arch. Cost in Switzerland, complete, about $600. Abstracts of Papers.
Concrete arches
Proc Inst CE
1885
Article (Journal)
English
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