池鹏 2021-05-29 19:开发者_开发问答40 零点五池鹏 2021-05-29 19:46 开发者_开发百科 M24普通螺纹的螺距有4种： 3、2、1.5、1螺距是3的中径为22.051，小径为20.752 螺距是2的中径为22.701，小径为21.835
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