完全螺纹与非完全螺纹的过渡部分要平滑统一.不完全螺纹的直径不得大于全螺纹的直径.螺纹之间的底部轮廓要有圆角.螺纹牙底直径不得小于全螺纹牙低径.
你说的应该是美标螺纹吧,最好说明一下螺纹类型
NPT NPSC NPSM NPSL.
因为螺纹还分带锥度还是不带锥度
英语翻译TRANSITION FROM FULL FORM TO INCOMPLETE THREADS SHALL BE
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