短语词组短语flush h cistern 厕所水箱dual -flush flushing cistern 双冲式冲厕水箱cast iron flush cistern 铸铁水箱toilet flush cistern 马桶池ordinary cast iron flush cistern 普通铸铁厕所水箱enamelled cast iron flush cistern 搪瓷铸铁厕所水箱 返回 flush cistern