According to the functional requirements, their technical characteristics consist of two ways on seal, ceramic package seal weld and tube polysulfone whirl forge seal, and the compact structure.
根据功能要求，本电气贯穿件的技术特点是采取了陶瓷组件封焊和钢管聚砜旋锻密封两种密封方法，以及紧凑的结构方式。
A kind of anti-whirl PDC bit designed based on the idea of flexible bit is introduced in this paper and the structure and working principle of it is expatiated.
回旋是导致PD C钻头早期失效的主要原因，介绍了一种基于挠性钻头的构想设计的抗回旋pdc钻头，阐述了其结构和抗回旋原理。
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