| 摘要 |
PURPOSE: A spiral pipe for a water and sewage pipe in road repairing is provided to improve the durability and solidity of the spiral pipe. CONSTITUTION: In a spiral pipe(30) having a hollow portion(39) and a joining unit(38) wound around both walls of the hollow portion, the lower edge or upper and lower edges of the hollow portion is bent. A triangular or square reinforcing unit(40) is integrated with the hollow portion. A cross-shaped support unit is integrated with the hollow portion.
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