| 摘要 |
PROBLEM TO BE SOLVED: To provide an underground storage-type oil tank which enables effective utilization of a tank burying space, and which facilitates burial work.SOLUTION: A cylindrical body 10 assuming a vertically long cross-section oval shape is formed. A ladder-like body reinforcement body 11 is welded to the center of an inside surface of the body 10. An end plate 20 is formed in an oval shape. A mirror plane reinforcement body 21 formed in parallel crosses is welded to the inside of a plate surface of the end plate 20. A longitudinal end of the body reinforcement body 11 is welded to the mirror plane reinforcement body 21. The body reinforcement body 11 comprises a main reinforcement 11 and a coupling reinforcement 11B. The mirror plane reinforcement body 21 comprises vertical and horizontal reinforcements 21A and 21B. |
