The criterions of seal design are presented that can keep the joint leak-tight as well as not damaging the seal surface.
给出了设计石油套管特殊螺纹接头时，既能保证其密封性，又不至于发生粘结损坏的条件。
It has many advantages, such as high working speed, seal impression is clear and no diffusing, seal surface will not shrink or deform.
它具有制作快捷（客户可即定即做、立等、可取）印迹清晰不扩散，印面不收缩、 不变形的特点。
This fact does not contact the shaft seal surface, it is the sealing principle of polymer cooled to half molten state and forming the seal.
这种密封实际上并不接触轴的表面，它的密封原理是将聚合物冷却到半熔融状态而形成自密封。
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