helical tracheid是什么意思

用法例句

Stress analysis on thread hole in woven composite materials;

燃料电池复合材料结构螺纹孔联接的应力分析

FEM analysis and design of the magnetizer on external thread testing of drill pipe;

钻杆外螺纹检测中磁化器的有限元分析与设计

The Design of the Special Installation of Thread Machining;

特殊螺纹加工装置的设计

Calculation and analysis on failure of J55 tubing string screw thread;

J55不加厚油管螺纹滑脱失效计算分析

Analysis and prevention on screw thread failure of oil pipe;

油管螺纹失效分析与预防

A comprehensive analysis on the failure of the screw threads connecting the oil tubes;

油管联接螺纹失效综合分析

Flaw Recognition of Screw Based on Alternating Magnetic Flux Leakage Testing;

交变漏磁检测在螺纹缺陷检测中的应用

The Study on the Machine Vision Method of Screw Measurement;

螺纹检测的机器视觉方法研究

The Study of Screw Parameter Measurement Based on Computer Vision;

基于计算机视觉的螺纹参数检测算法研究

Seal analysis of API8 button round threads;

API8牙圆螺纹接头密封性分析

Simple method calculating the big pore size and the small pore size of cylinder tube threads in drawing;

在绘图中圆柱管螺纹大径小径简便计算法

In view of the problems of the standard SY/T-5383-1999 "Downhole Motors" concerning the threads, suggestions for its modification are proposed based on the on-site situation to make the threads' flexural strength achieve a more balanced connection and to make the standard more scientific and reasonable.

针对SY/T5383-199《9螺杆钻具》标准中有关螺杆钻具连接螺纹存在的一些问题,联系现场工作实际,提出了修改建议,以使螺杆钻具连接螺纹的弯曲强度比更加接近平衡连接,整个标准更加科学合理。