| 摘要 |
In combination a tubular strainer having a wall defining interior and exterior surfaces, and a first flange on the upper end of the wall, a tubular insert having a cylindrical wall sized for reception by the tubular strainer, and a second flange carried by the insert wall, an elastomeric seal having a tubular body fittingly sealingly carried by the insert cylindrical wall, the seal body configured for progressive compressive radial sealing engagement with the strainer wall interior surface when endwise inserted by the insert within said tubular strainer. |
