Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 125
ibility is characteristic ofautomatic apparatus. It is the purpose of this chapter to show the most approved ways ofmounting automatic switches on frames for installation, to give an ideaof how the switches are linked together in practice, and to illustrate theflexibilities in trunking… … k b bk k b b l»l» imXTD ^mmm b t? in Is b .b b b tn i? tm\mimimmMk»tmim*lK
Telephone
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