最終更新日：2025/12/06
The addition of strontium nitrate to the pyrotechnic mixture produced a vivid red color and improved combustion as an oxidizer.
正解を見る
The addition of strontium nitrate to the pyrotechnic mixture produced a vivid red color and improved combustion as an oxidizer.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
