最大问题是ISO螺孔默认配用的牙型不完全是国标螺纹指定的
错 对 M22X3 M22X2.5 M50X4 M50X3 M56X6.5 M56X5.5 M75X6 M75X4 M125X8 M125X6 M130X8 M130X6 M140X8 M140X6 M150X8 M150X6 M160X8 M160X6 M170X8 M170X6 M180X8 M180X6 M190X8 M190X6 M200X8 M200X6 M210X8 M210X6 M220X8 M220X6 M240X8 M240X6 M250X8 M250X6 M260X8 M260X6 M280X8 M280X6 M300X8 M300X6
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