. Building and repairing railways . Fig. 369. HOISTING CRABS OR WINCHES. A. Single Purchase. B. Double Purchase. Used in connection with blocks and falls in hoisting heavy timbers andraising framed bents. MAINTENANCE OF BRIDGES jiND BUILDINGS. 461. Fig. 370. TIMBER TRUCKS OR DOLLYS. USED IN HANDLING HEAVY TIMBER.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901