| 摘要 |
A sealing cap has an external cover section of external diameter greater than a circular sealing face about an opening. An internal cover projects into the opening, and a tightener is provided. A diametral handle is molded on the external cover section and has a U-shaped stirrup with two legs connecting it to the external cover section, and a wall extending along the center of the stirrup and connecting it to the external cover section. The improvement of the invention is that each cover section is made as a one-piece molding, and the legs of the stirrup are spaced by not less than the external diameter of the cover section sealing face, and the length of the wall, longitudinally of the stirrup, is less than the internal diameter of the cover sealing face.
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