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Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 182
RHEOSTATS AND CONTROLLERS 171 … Fig. 270.—Connections for non-reversing machine-tool drum-type controller. are connected together. Like numbers 172 WIRING J)IAGRAMS OF ELECTRICAL APPARATUS 432/ / 2 3 4Electric wiring
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