油母 ゆぼ頁岩 けつがんだったら yuboketsugandattara 1. If/when oil shale; If it were oil shale Noun Open Menu Add to collection... Open
頁岩 けつがんだったら ketsugandattara 1. If/when shale; If it were shale Noun #215917 Open Menu Add to collection... Open
頁岩 けつがんじゃなかった ketsuganjanakatta 1. Wasn't shale.; Wasn't slate. Noun #216158 Open Menu Add to collection... Open