| 摘要 |
<p>The bottom portion (8) of a container (1) is formed such that the bottom portion can elastically deform to protrude downward and upward. The bottom portion (8) has a strength that prevents the bottom portion from protruding downward due to the weight of grains filled in the container (1) and vibration applied to the grains, in the case where the bottom portion is protruding upward.</p> |
