0533チョコボ ◆aQ.85zBVbFFE 垢版 | 大砲2018/08/05(日) 13:43:38.14ID:CSGqWmKk ダムの役割についてこれ読めばわかるだろうに https://i.imgur.com/WqRgx9V.jpg https://i.imgur.com/GtoD77e.jpg https://i.imgur.com/Ezb84VC.jpg https://i.imgur.com/6LoJi2V.jpg