This round root form is substantially stronger and provides better fatigue resistance than conventional cut threads. The threads of both grades of couplings are coated for anti-galling properties. T和抽油杆联结SM等级。 两个等级制造与寒冷工作的预应力,滚动被形成的螺纹。 这个圆的根形式比常规裁减螺纹...
A method for measuring on a machine tool, cut produced by a helicoidal guide, in particular by means of threads of roll machines of this thread flanks, and apparatus for carrying out the methodGISEN FRITZ