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2Â¥: Originally posted by wurongjun at 2015-04-29 11:10:21
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gisjun(feixiaolin´ú·¢): ½ð±Ò+15 2015-04-30 07:42:58
ÒýÓûØÌû:
3Â¥: Originally posted by gisjun at 2015-04-29 20:06:38
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A is tangent to B

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A intersects with B

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A is separate from B
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