最終更新日：2024/07/28
(geology) A sedimentary rock composed of the shells of diatoms etc., used for polishing.
正解を見る
tripoli
編集履歴（0）
(geology) A sedimentary rock composed of the shells of diatoms etc., used for polishing.
tripoli
DiQt（ディクト）
無料
★★★★★★★★★★
