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M20螺栓20是指什么
更新时间: 2020-07-10 00:00:00  

螺栓是机械零件,要求产品匹配度高度一致,所以对产品的型号规格有系统的划分。

其中,M20表示螺栓,在螺栓固定连接及可拆卸连接工过程中,螺栓的外径,也就是螺栓外表面的直径,必须为20毫米。

关键词: m20 螺栓 什么

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