| 摘要 |
The container(1) is made of raw metal without ironing working and has not no seam in side wall and at a boundary line between the side wall and the bottom face. The easy-buckling portion of the side wall(the height of 5-20mm from the bottom) is tapered at the angle of 30-5≦̸ and the diameter of container is decreased downwards, and the circumferential reinforcement region is composed of the metal which forms the radius of curvature 5-25mm.
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