会正确注写和识别表面粗糙度代号，尺寸公差与配合代号，形位公差代号。
Be able to label and read surface roughness codes, codes of size tolerance and fitting, and geometrical tolerance codes.
介绍了常见的用于紧固联接英寸制螺纹和用于管道连接英寸制螺纹的牙形、配合和标识，以及管螺纹的密封特点。
The tooth shape, fit and mark of clamping connection and pipe connection inch threads commonly used are introduced and their seal features.
采用带有非线性顶头锥角的顶头与桶形辊相配合可以获得线性的成壁变形区，从而大大提高壁厚精度。
Linear deformation zone of generating wall can be obtained by means of non-linear cone Angle plug combined with the barrel-shaped rolls, so the wall accuracy can be increased greatly.
应用推荐