螺丝没拧紧，或拧太紧把垫圈拧炸了。总之干啥事都要专业点。

来源: 温哥华农民于 2015-11-21 10:19:59 [旧帖] [给我悄悄话] 本文已被阅读：次

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螺丝没拧紧，或拧太紧把垫圈拧炸了。 总之干啥事都要专业点。