doubly ruled surface


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doubly ruled surface

[¦dəb·lē ¦rüld ′sər·fəs]
(mathematics)
A ruled surface that can be generated by either of two distinct moving straight lines; quadric surfaces are the only surfaces of this type.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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