| 摘要 |
PROBLEM TO BE SOLVED: To safely disuse a disaster prevention apparatus such as a fire extinguisher and a fire sensor, and to easily buy and renew the disaster prevention apparatus such as the fire extinguisher and the fire sensor. SOLUTION: Access is made from a requester, and when there are a recovering request and a selling request from the requester, a determination is made on whether or not the apparatus can be recovered and sold, and a determination result is informed to the requester. |
