“发现有好几处下沉”是指哪里，地面吗？地毯下面是什么？

来源: pickshell 于 2020-05-17 10:34:22 [旧帖] [给我悄悄话] 本文已被阅读：次

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“发现有好几处下沉”是指哪里，地面吗？ 地毯下面是什么？