RULESURF command
Creates 3D polygon mesh by connecting two separate linear entities (short for “ruled surfaces”).
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描述(D)
Creates a 3D polygon mesh in the shape of a ruled surface by specifying two separate entities.
方式
Specify the first and the second boundary entity. For the first boundary any open object, such as a line, arc, polyline or spline can be selected.
Closed entities and 3D entities are not accepted.