2820| 3
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如圖所示,,一圓臺展開圖的邊緣怎么是齒型的,? |
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點評
圓臺尺寸:上圓直徑300,,下圓直徑157,高300,,板厚3,;掃描成型,,但就是在展開后,,板的邊緣出現(xiàn)齒型狀。
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