Last Updated：2025/12/05
During the plant inspection, the operators scraped away a dense layer of sewage fungus that had accumulated on the aeration tank walls.
See correct answer
During the plant inspection, the operators scraped away a dense layer of sewage fungus that had accumulated on the aeration tank walls.
音声機能が動作しない場合はこちらをご確認ください
Edit Histories（0）
