| 摘要 |
PURPOSE: A waterstop ring of a sewer pipe for a concrete manhole is provided to support a sewer pipe to concrete smoothly and to prevent a water leakage in a joint between concrete and a sewer pipe. CONSTITUTION: The waterstop ring of a sewer pipe for a concrete manhole contains flanges(2) formed continuously along the border of a main body, fastening pieces(3) provided with a fastening hole(3a) and joined on both ends of the main body and the flange(2), and a connecting piece joined on the backside of each end of the flange(2) to prevent a water leakage in concrete.
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