第四种方式是结构防松。是利用螺纹副自身结构，即唐氏螺纹防松方式。
指出了在工程上选用合理的联接结构和防松措施，可有效地提高螺纹联接的可靠性。
In engineering application, selecting reasonable joint structure and prevent loosing method will effectively enhance the reliability of threaded joint.
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.
文章介绍了多种螺纹联接的预紧力控制方法和防松措施，从多方面针对性的阐述了解决螺纹联接质量的方法。
This paper introduce the many kinds of thread joint pre-tightening up force control method and against loose measure, elaborates the solution thread joint quality method.
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