论文部分内容阅读
1 前言日本自从19世纪八十年代末期使用现代供水系统以来,多层住宅供水通常由两部分组成,2层以内的用户水管通常采用小区街坊或室外市政管网直接供水,称为直接供水系统,3层以上则采取安装水箱/水泵的间接供水系统。当时由于大多数住房高度均为1～2
1 Foreword Since the modern water supply system was used in Japan in the late 1880s, the water supply for multi-storey residential buildings is usually composed of two parts. The user pipes within the second floor are usually supplied directly by residential neighborhoods or outdoor municipal pipe networks and are called direct water supply systems. Above the 3rd floor, an indirect water supply system with a water tank / water pump is installed. At that time because most of the housing height are 1-2