每隔两年换一个，平均一年50块，为什么不装？拉线麻烦多了。贵多了。安装非常容易。

来源: 原上草2017 于 2024-12-02 10:15:24 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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