螺纹副是指利用螺纹旋合实现的一种机械联接，可以用于联接和传动。
对目前国内外螺纹副的常用防松方式进行了介绍。
The ways to prevent loosing of screw pairs at home and abroad are presented.
螺纹连接中螺母松动的主要原因是，横向动载荷作用和由此引起的螺纹副横向振动。
In thread connection, the main causes of loosening of nuts are action of lateral dynamic load and the induced lateral vibration of thread pairs.
本发明还涉及密封管道外螺纹的制造方法、制造装置以及导入式过盈配合管螺纹副管件。
The invention also relates to a method and a device for manufacturing the external thread of the sealing pipeline and a thread pair pipe fitting of a guide-type interference fit pipe.
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