后退方向有两个橡胶的wheel chocks顶住了，前进方向只找到了一个木头的，故左侧向前的缺失。

来源: 5W40 于 2022-11-19 16:55:58 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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