短语词组短语trough water -closet 槽式水厕water -closet fitment 水厕设备WC -water closet 上午valve -operated water closet 冲洗阀马桶close -coupled water t 紧密装配式大便器Reverse -Trap Water Closet 回弯式座便器seat -type water closet 坐式便器 返回 water-closet