This paper discusses the mechanical, hardware, software configurations and principles of CAT system for joint internal thread in details.

To solve the disadvantage of traditional contract measurement method for internal thread, a non-contract measuring method based on the theory of fiber-optic sensor was introduced.

针对传统内螺纹参数接触测量方法的不足，提出采用光纤位移传感的方法实现内螺纹参数的非接触测量。

The utility model relates to a tool for measuring internal thread depth of mechanical parts.

本实用新型涉及机械零件的内螺纹深度测量工具。

The manufacturers find it difficult to detect the steel pipes with extra deep internal thread groove if they do not meet the relative quality standards.

内螺纹槽超深的钢管不符合相关质量标准，但生产厂却难以检测出内螺纹超深的钢管。

An optimum design of the internal thread mechanism

内螺旋机构的优化设计

Meanwhile, the mathematic model of the optimum design for the internal thread mechanism is built, and the optimal design can be obtained.

同时，建立起内螺旋机构的优化设计数学模型，从而可获得最佳设计。

Study on Measurement of Pitch Diameter of Internal Thread by Three& ball Method

关于内螺纹中径三球量法的探讨

Design of the Injection Mould for Right Angle Water Supply Pipe Joint with Plastic Lining Internal Thread

内螺纹衬塑直角管接头注射模设计

Dai: The internal thread of the true artist is an unbroken one.

戴卓群：真正的艺术家内在的线索一定是一致的。

Taper pins with internal thread

GB/T118-1986内螺纹圆锥销

Application of Single Chip Processor in Cold Extrusion of Internal Thread of 300M Steel

单片机在300M钢内螺纹冷挤压过程监测中的应用

Image Measurement on Internal Thread of Ball Screws

滚珠丝杠副内螺纹的图像测量

Hot tapping of internal thread of titanium alloy single-side threaded self-plugging rivet

钛合金单面螺纹抽钉内螺纹热攻丝

CAT System for Joint Internal Thread

油管接箍内螺纹计算机辅助测量系统

Study on Algorithm of CAT for Joint Internal Thread

管接箍内螺纹CAT系统计算方法的研究

Injection mould with screw-driven mechanism for internal thread

内螺纹螺旋传动脱模的注塑模设计

According to connection method classification ( 1) threaded connection valves: valve with internal thread or external thread, and pipe thread connection.

按连接方法分类（1）螺纹连接阀门：阀体带有内螺纹或外螺纹，与管道螺纹连接。

Research on a Double Probe Computer Aided Testing System for Internal Thread of Joint

管接头内螺纹双针计算机测量系统的研究

External thread on lens barrel is matched and locked to internal thread on the lens seat.

一镜筒设有外螺纹,是螺锁于该镜座的内螺纹上.

Nuts have internal ( or female) threads to match those of the Bolt.

螺母上有内（或阴）螺纹，与螺栓上的螺纹相啮合。

Three dimensional FE simulation of ball spinning of inner grooved copper tubes

两端带阴螺纹管接的直通旋塞内螺纹铜管滚珠旋压三维有限元模拟