Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 718
l it picks out a trunk line leading to acertain selector in that thousand that is not busy. It is obvioussince the bank contacts of the first selectors are multipled, that un-less special arrangements are made to guard against it, the wiperson different first selectors might stop on the same trunk… … FIG. 503.-SELECTOR SWITCH, FRONT VIEW.096
Telephone
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