| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a recessed part of a vessel bottom from being reversed and projected outwardly even when it is affected by the increase of the internal pressure due to the temperature rise of the stored liquid after the stored liquid is heated together with a vessel for a relatively long time so as to keep the stored liquid in a heated condition, and to prevent the vessel from being toppled while it is heated. SOLUTION: A projected part to be projected outwardly of a vessel is provided on a top part of a recessed part 5, and a longitudinal wall part 8 which rises continuously to a vessel ground-contact part 4 is annularly provided over a circumferential edge at a lower end of the recessed part 5.</p> |
