从热水器底部的排污阀排出大约5加仑的水。
Drain out 5 gallons of water from the drain valve at the bottom of the heater.
在上行管的底部设一清洗排污出口，用过一段时间加入清洗剂，打开 下排污口进行冲洗，一根根清洗。
The bottom of the risers is provided with a cleaning drain outlet which can be opened for washing the risers one by one by adding a cleaning agent after a period of use.
生物操作配置；工作台底部配有排污接口，排风处设置高效过滤器。
Biologically operating configuration, drainage joint is in the bottom of bench, effective filter is in the vent.
生物操作配置；工作台底部配有排污接口，排风处设置高效过滤器。
Biologically operating configuration, drainage joint is in the bottom of bench, effective filter is in the vent.
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