| 摘要 |
PROBLEM TO BE SOLVED: To eliminate twisting of a cord connecting a telephone set main body and a transmitter-receiver is twisted during use of the telephone set. SOLUTION: A rotatable knob is formed at the top of the transmitter- receiver. By hanging the transmitter-receiver with this knob held with the tip of fingers, the transmitter-receiver is rotated for removing twisting by utilizing rotational force made by twisting of the cord itself.
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