短语词组短語flush h cistern 厠所水箱dual -flush flushing cistern 雙沖式沖厠水箱cast iron flush cistern 鑄鉄水箱toilet flush cistern 馬桶池ordinary cast iron flush cistern 普通鑄鉄厠所水箱enamelled cast iron flush cistern 搪瓷鑄鉄厠所水箱 返回 flush cistern