Concrete Railroad Cross Tie.

摘要

8127. Rosencrans, E. J., and Sanderson, H. Oct. 14, 1912, [Convention date]. Cotters. - The reinforcing - rods 2 of railway concrete sleepers and the securing - holts for the rails have cotters 5 which have split threaded shanks 8 engaged by nuts 7 and then opened out.