放电管主要用于过压防雷保护。
Discharge tubes are mainly used for over-voltage protection.
半导体放电管是新一代抗浪涌保护器件，极间电容是其应用到高频环境下的一个限制因素。
Semiconductor arrester is a new type of surge protection device, which, however, has a large interelectrode capacitance, thus limiting its application in high frequency systems.
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