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1. A telescopic conductive tube, comprising a conductive assembly, wherein the conductive assembly comprises an isolating guide, an isolating restraining tube, a rail, a wire, a guiding rod and a conductive spring, the conductive spring is sleeved on the guiding rod and electrically connects with the wire, the guiding rod and the conductive spring are accommodated within the isolating restraining tube, the isolating restraining tube is accommodated within the isolating guide, the wire is accommodated within the rail, the isolating restraining tube has an end inserted into the rail, the rail is slidable relative to the isolating guide, and wherein when sliding into the isolating guide, the rail slides along an outer wall of the isolating restraining tube, and the conductive spring is compressed by a bottom of the rail.
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