The principle of the five axis tube-shape measuring machine system in contact type is analyzed. Point out the hardware and software of this system as well as the procedure to compensate spring-back.

分析了接触式五坐标管形测量机的工作原理，提出了其测量系统的硬件和软件的一种实现方法，探讨了实现管材弯曲回弹补偿的方法。

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Small steps all around the surface and also observed with their edge parallel to the tube axis.

还观察到表面各处有楞边平行于管轴的小台阶。

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This paper also presents a method to solve the tunnel axis displacement on line caused by angle error between tube center axis and datum of joint.

分析了对接面与管段中心线夹角误差对沉放后线路位置的影响，提出了控制隧道轴线偏差的措施；

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