File:Baops.gif

DescriptionBaops.gif Four figures for Boolean algebra article Date 7 July 2007 Source Own work Author Vaughan Pratt

DescriptionBaopscn.gif 中文（中国大陆）：从英文版的图片Baops.gif汉化而来，源作者 Vaughan Pratt，他允许自由更改和发布。 Date 17 January 2008 (original upload date) Source Own work Author

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