The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 374
AERIAL LINE CONSTRUCTION 345 … hemp ropes is about 20 per cent, less and for white hemp about6 per cent, higher than for manila. Stays.—When a pole is subjected to heavy stress by thewires going off at an angle, stays or guys are used to preventthe pole going over in the directionof the strain. They are usuallymade up of five or…
Telephone
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