... 断背曲线broken-back curve 回头曲线switch-back curve 缓和曲线transition curve ...
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For the purpose of application, the author tabulates the coefficient tables of transition curve of 6th power function and describes emphatically its application to switch-back curves.
为了应用，笔者编制了六次代数式缓和曲线系数表，并着重阐述了它在回头曲线中的应用。
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