这几个可能是热敏开关管，温度高了，集电极和发射极就通了，然后继电器也通了，风扇有电就转起来了。

来源: 原上草2017 于 2023-03-22 07:20:08 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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