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American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 544
-COLLECTOR SPACE-SIGNAL* … RECEIVING STATION ^_ 58 FIGURE-SHIFT 57 [TRANSLATOR ^ p\jumjwu~ij pai^^tj-v]^ PRINTER GOVERNING ^ p^ v^ aTelegraph
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