| 摘要 |
PURPOSE: A dual-wall sewer pipe using profiles connected as an extruded state is provided to bear enough pressure by improving strength by maintaining the stable extrusion state. CONSTITUTION: A dual-wall sewer pipe using profiles connected as an extruded comprises left and right posts(11,12), top and bottom Beams(13,14), a cross reinforcing support(17) and a joining member. The left and right posts have left and right post linking grooves. The top and bottom beams have the top and bottom beam linking grooves. The left and right post is combined in both ends of the top and bottom beams.
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