安全分流井内设有雨水排水管、分流管和水质传感器；
A rainwater discharging pipe, a distributing pipe and a water quality sensor are arranged inside the safety distributing well;
客人入口附近不允许有外露的雨水排水管，必须将其隐蔽起来。
Exposed rain drains are not acceptable adjacent to guest entrances and must be concealed.
他安装了雨水槽和排水管。
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