nounダウンロード🔗共有下降器A piece of metal around which a rope is passed in order to slow descent when abseiling例:"The climber carefully threaded the rope through the descendeur before beginning her controlled descent down the rock face. "クライマーは、岩壁を降り始める前に、ロープを下降器に通しました。sporttechnicalitemAIとチャット語彙ゲーム読解練習