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Manual of recommended practice for railway engineering and maintenance of way (1905)

American Railway Engineering and Maintenance-of-Way Association · Chicago, Ill. : The Association · leaf 87

An illustration from Manual of recommended practice for railway engineering and maintenance of way, 1905, leaf 87
Fig. 2.—Pith Knot. 76 WOODEN BRIDGES AND TRESTLES. … Fig. 3.—Encased Knot.

Railroad engineering · Railroads

Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.

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