55°圆锥管螺纹滚丝轮
Thread rolling cylindrical dies for taper pipe threads with 55° thread angle
2013-04-25
HB 7542-1997
55°锥管螺纹用滚丝轮技术条件
JB/T 8364.5-2010
60°圆锥管螺纹刀具 第5部分:60°圆锥管螺纹滚丝轮
Tools for taper pipe threads with 60°thread angle. Part 5:Thread rolling cylindrical dies for taper pipe threads with 60°deg.thread angle