| 摘要 |
<p>The seal (10) has a back wall (11) forming back of D shape of the seal, and a belly wall (12) forming the belly of the D shape of the seal, where the seal is made of elastically deformable material. Two side walls (13) connect the back and belly walls. The back wall includes, in uncompressed state, a concave face defining a hollow part (11a) between two crowns (14). Height (h) of the hollow part ranges from 50 to 60 percentage of the height of the seal, and depth (p) of the hollow part ranges from 4 to 8 percentage of thickness (E) of the seal. An independent claim is also included for a tank comprising a tank body having a neck with an axis of revolution.</p> |
