| 摘要 |
PURPOSE: A paper mold made of a semicircular paper tube is provided to reduce construction time and costs and facilitate transporting, installation, and removal. CONSTITUTION: A paper mold made of a semicircular paper tube comprises a pair of semicircular inner circular paper tubes(20), a pair of semicircular outer circular paper tubes(30), and bending(40). The semicircular outer circular paper tube adheres closely to the outside of the inner circle type paper tube. The bending fixes the outer circular paper tube.
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