FIG. 4.Section of Rail, Block, Wedge, &c. … SPECIFICATION. The nature of the invention consists in adding strength to suchmetal rails and bars as may be used for railways, and also to suchtimber beams, supporters, and bearers, as may be used in the construc-tion of bridges and viaducts, by giving tenseness to the same bymeans of keys or…
Civil engineering · Architecture
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