| 摘要 |
A train of signal pulses are transmitted from telephone message lines through two signal frequency channels at a receiving station for decoding and selection of one of a plurality of solenoid-operated card ejectors during an initial signal transmission interval. Reception of the same signal pulse train a second time supplies an energizing pulse to the selected ejector. Energy to operate the selected ejector is obtained from the message lines and is stored during the initial signal transmission interval.
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