Channel surface

（重定向自Canal surface）

canalsurface: directrix is a helix, with its generating spheres

pipe surface: directrix is a helix, with generating spheres

A channel or canal surface is a surface formed as the envelope of a family of spheres whose centers lie on a space curve, its directrix. If the radii of the generating spheres are constant the canal surface is called pipe surface. Simple examples are:

单词	Canal surface
释义	Canal surface 英语百科 Channel surface （重定向自Canal surface） A channel or canal surface is a surface formed as the envelope of a family of spheres whose centers lie on a space curve, its directrix. If the radii of the generating spheres are constant the canal surface is called pipe surface. Simple examples are:
随便看	Nakhon Luang Nakhon Nayok Nakhon Nayok, Changwat Nakhon Pathom Nakhon Pathom, Changwat Nakhon Phanom Nakhon Phanom, Changwat Nakhon Ratchasima Nakhonratchasima Nakhon Ratchasima, Changwat Nakhon Sawan Nakhonsawan Nakhon Sawan, Changwat Nakhon Si Thammarat Nakhon Si Thammarat, Changwat Nakhon Thai Nakhpāra Nakhtmin Nakhwaan Naki Nakia nakib nakie Nakifuma Nakigalala