回轉蓋快開手孔 handhole cover: 觀察孔蓋; 手孔蓋handhole with flat cover: 平蓋手孔manhole with rotatable cover: 回轉蓋入孔quick opening: 快速斷開; 快速開啟quick-opening: 快開下載手機詞典可隨時隨地查詞查翻譯