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简要介绍了φ1620mm内承式螺旋焊管机及成型技术的特性，论述了调型技术数学关系式，为设计和使用提供了科学依据。
The characteristics of φ1620mm internal screw spline pipe welding machine and forming technology are briefly introduced. The mathematic relation of adjusting technology is discussed, which provides a scientific basis for design and use.