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2020年10月12日 (星期一)
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2020年10月12日 (一) 03:11
BotMultichillT
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已更改实体：
Adding structured data: date, source, copyright & author
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2015年4月12日 (星期日)
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2015年4月12日 (日) 05:54
Jdx
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Jdx uploaded a new version of
File:HyperboloidOfTwoSheets.svg
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2015年1月20日 (星期二)
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2015年1月20日 (二) 05:39
YaCBot
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Internationalisation
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2011年5月23日 (星期一)
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2011年5月23日 (一) 06:11
Krishnavedala
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{{Information |Description ={{en|1=Hyperboloid of two sheets described by the equation <math>-0.25x^2 - 0.16y^2+z^2=1</math> and <math>-5\le x\le 5</math>, <math>-5\le y\le 5</math>, <math>-2\le z\le 2</math>.}} |Source ={{own}} |Author
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