皮带这类, 肯定有前兆, 只是(肉眼) 看不到。和金属疲劳类似, 应当还是查得出的。

来源: PrimeryColor 于 2019-03-24 14:52:57 [旧帖] [给我悄悄话] 本文已被阅读：次

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