为解决现有凸缘式预制溜管密封性差的问题，本发明在管体的凸缘上带有凹槽，以便在装配中安装密封圈，提高其密封性。
There is an indent on the flange of pipe body for arranging a sealing ring in it during the assemblage of pipeline in order to increase its tightness.
为解决现有凸缘式预制溜管密封性差的问题，本发明在管体的凸缘上带有凹槽，以便在装配中安装密封圈，提高其密封性。
There is an indent on the flange of pipe body for arranging a sealing ring in it during the assemblage of pipeline in order to increase its tightness.
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