Narrow Ridge or Wide Channel?

テーマ: Science: Math: Geometry
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ID :2195
作者 :luweewu
日付 :06/02/23
点数 :33
人気度 :61.87%
Solvers :9046
平均時間 :00:01:33
Your Time :
規模 :(7+4)x(2+4)x6
色 :
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