该部分从城镇消防用水量标准、消防给水管道管径和压力、市政消防栓的布置等几个方面分析研究消防供水的问题。
This part researches and analyses the municipal fire consumption, pipe diameter and pressure of fire water supply pipes, space between municipal hydrants and other problems of fire water supply.
开关可以安装在异径三通管，标准三通管或焊接管件上。
Flow switch can be installed in a reducing tee, standard tee or welded fitting.
括号内的数值为SH 3410标准中规定的同径管件尺寸，相应的异径管件尺寸见产品标准。
The values of the bracket means the sizes of straight fittings defined in the codes of SH 3410, and the relevant sizes of the reducing fittings refer to the standards of production.
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