Case number 11

Rotational surfaces, asymptote lines Rotational surfaces, asymptote lines Rotational surfaces, asymptote lines Rotational surfaces, asymptote lines
Rotational surfeaces, asymptote lines Rotational surfaces, asymptote lines Rotational surfaces, asymptote lines Rotational surfaces,  asymptote lines
Developable helicoid Pipe helicoid with curve lines Helical surface

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