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1·About this standard provision classify, trepanning and reinforce of hull structure.

本标准规定了船体强力构件上的区域分类，开孔及补强。

2·There are two kinds of gun drills, namely, the center-cut gun drill used for drilling blind holes and the trepanning drill.

深孔钻有两种类型，即用于钻盲孔的中心切削深孔钻和套孔钻。

3·Based on analyzing the characteristic of engineering ceramic and fiber composite, the diamond trepanning drill is selected.

基于工程陶瓷及纤维增强复合材料的性能特点，选用金刚石套料钻来对其进行钻孔加工。

4·The tool design, working methods and process fundamentals of the trepanning processing were introduced. It proved that trepanning processing is a more cost-effective and accurate method.

从套孔刀具的设计、加工方法以及套孔工艺的基本要求几个方面说明，套孔是一种更经济、有效并且精确的深孔加工方法。

5·Radial distortion of the flexible component in the stop valve can be adjusted so as to ensure the joint depth between flexible screw thread trepanning circular groove and screw thread on the screw.

截止阀的柔性元件的径向变形值可以调节，保证柔性螺纹套的环槽与螺杆上的螺纹的接合深度。