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petitjean electrical components refer to lightning arrestor tubes or antenna switch tubes used for overvoltage protection. The tube contains two or more electrodes and is filled with a certain amount of inert gas. A gas discharge tube is a gap-type lightning protection component used in the lightning protection of communication systems. Gas discharge tubes are gap-type lightning protection components that have been widely applied in the lightning protection of communication systems. Discharge tubes are commonly used in the first stage or the first two stages of multi-stage protection circuits to discharge instantaneous lightning overcurrents and limit overvoltages. Due to the high insulation resistance between the electrodes of the discharge tube,