How To Use Telephone circuit In A Sentence

• To equip ( a room or telephone circuit, for example ) with a concealed electronic listening device.
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• The equivalent disturbing current, which determines the harmonic interference noise in nearby telephone circuits, is studied systematically.
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• Also interference with telephone circuit is reduced because of the absence of zero - sequence currents .
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• At periodical intervals, the network returns the data to a central control room by cellular phone, satellite, or a conventional telephone circuit.
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