| http://www.w3.org/ns/prov#value | - These signals are applied to the circuit of FIG. 13 and, through the memory elements R1UA to R9UA and R2DA to R10DA, operate in such a manner as to energize the service relays Ry1UA to Ry9UA and Ry2DA to Ry10DA upon the generation of hall calls HC1U to HC9U and HC2D to HC10D. These memory elements are so constructed as to store and maintain any energi
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