很明显这是这个牌子的产品偷工减料。这个单向阀的塞子，肯定会比普通的一个实心塞子成本高。

来源: 咲媱于 2025-07-11 12:56:51 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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