Spiral

 Creates a spiral.

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        Command:

        Menu【Draw > Spiral】                            Curve Bar

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         Archimedes spiral

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Steps:

1.Select Archimedes spiral.

2.Type the windings.

3.Pick the start of spiral.

4.Type the radius of spiral.

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        Logarithm spiral

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Steps:

1.Select Logarithm spiral.

2.Type the windings.

      3.Pick the start of spiral.

      4.Type the radius of spiral.