这些用户中只有1/3认为用水表计量是合理的。
Only a third of these households thought it reasonable to meter water.
泰晤士水务公司的大部分用户以往没有安装过任何类型的水表，即便如此，该公司现在正计划给部分用户安装智能水表。
Even Thames Water, most of whose customers have no meters of any sort, is now planning to install some of the smart kind.
用户要由安全饮用水供应商在水表处安装法定的双止回防回流阀。
The user installs a dual check back flow preventer at the water meter as prescribed by the supplier of safe drinking water.
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