Culvert drainage pipes for drainage and supply

摘要

The present invention relates to a culvert drainage pipe which can be drained and supplied so that the application is possible according to the use of the culvert drainage pipe. Conventional water supply and drainage pipes include the applicant's application for a declaration (Utility Model Registration Application No. 98-Aug. 31, 1998), etc., but it is about the improvement of the structure and the hollowness of the conventional THP pipe. It can be used to form a water supply port, but the cross-sectional area of the supply port of the hollow portion is difficult to supply the role of the curved connector tube 21 or coil-type connection tube 29 assembled in accordance with the structure of the curved portion of the spiral winding There is no provision and is configured to be easy to use in the field by providing a supply pipe 26 in which a curved portion 27 is formed on one side, and a product related to this embodiment.