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The "R"(Radius) indicates the radius of end point of spiral
transition curve;
After inputting the "Line", "Circle", "Spiral", press [ENT] to
receive the input and exit to "Define(H)". if you want to view the
input, press [ENT] to finishing inputting and enter the interface of
"List of H curve";
● Press [Save] to save the input data;
● Press [View] to display the input;
If you find some of them are wrong, you can press [Edit] to
modify. You can press [PgUp](Page up) or [PgDn](Page down) to
check the inputs one by one. You can press [Add] to continue
inputting after pressing [ESC].

10.1.1.2 Intersection method

After choosing [I.P] and finishing inputting 'Define (H)-Begin',
you can press [ENT] to enter the interface of inputting intersection as
followed:
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