我觀察到，化纖的鞋帶打滑，容易鬆開；全棉的鞋帶摩擦力大，不容易鬆開。現在我都換成全棉的了。

來源: 嚴惠姍於 2022-05-04 19:49:41 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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