浅析管螺纹的分类和标记方法

Brieflv analvsis the classification and marking method of oioe thread

简要介绍了管螺纹的分类，详细地阐述了美制管螺纹、英制管螺纹、米制密封螺纹标准及标记方法。

Briefly introduce tile classification of pipe thread,detailedly expound American-made pipe thread, British-made pipe thread,metric system pipe thread and marking method.