clean-out valve清洗排放闸
clean-out auger清孔钻;清孔
clean-out hole清扫口
internet clean-out网络清淤
clean-out door清洗排放闸门;清渣门;清除门
clean-out opening清扫孔
clean-out crew小修队
clean-out cover入孔盖
clean-out system清洗剂
PHRASAL VERB（动词词组） If you clean out something such as a wardrobe, a room, or container, you take everything out of it and clean the inside of it thoroughly. 全面清理
Mr. Wall asked if I would help him clean out the barrels.
沃尔先生问我能否帮他把桶彻底清扫了。