Case number 12

The tangent surfaces belonging to models 163-170 The tangent surfaces belonging to models 163-170 The tangent surfaces belonging to models 163-170
The tangent surfaces belonging to models 163-170 The types of the development of a space curve at a small scale The types of the development of a space curve at a small scale
The types of the development of a space curve at a small scale The types of the development of a space curve at a small scale Circular cylinder, ball and circular cone in relief perspective

The corresponding bottom case is: Case number U 12

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