首頁›Browse›H›hard coalhard coal編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看hard coalhard coal — 名詞名詞1. a type of coal that burns slowly with little smoke1.名詞釋義無煙煤a type of coal that burns slowly with little smoke例句Hard coal is often used for heating in homes.