International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 332
Cost to R. R. Company 22.39 cents per cubic yard. 1496. Drag Scraper Work.—The drag scraper (see Fig. 414) holds from .15 to .25 of a cubic yard of material. The same laborof horse and man is required^^ /-Q-N for the drag scraper as for the wheeled scraper, except-ing the snatch team. Theteam will… … 922 RAILROAD CONSTRUCTION.
Railroad engineering
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