如果防塵膠套不動，而鐵片可以動，就是鐵片鬆了，會使膠套的那一端前後移動，灰土也會從縫隙裏進入。

來源: Shubin 於 2022-11-23 08:30:36 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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