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过去建筑物上的避雷针一目了然,十分醒目。但是,现在这种传统的富兰克林避雷针已经不多见,基本被“笼式避雷网”取代。例如,北京
In the past, the lightning rod on the building was clear and very eye-catching. However, this traditional Franklin lightning rod is now rare and basically replaced by a “cage lightning protection net”. For example, Beijing