A pump in the boiler send hot water round the central heating system. 热水器中的水泵将热水输送给集中供热设备。
A raised tank or hopper that maintains a constant pressure or supply to a system, especially the small tank that supplies water to a central heating system. 蓄水塔一个处于高处的用以维持某系统的稳压或供给状况的水箱或漏斗，尤指将水供给中央供暖系统的小水箱
A pump in the boiler sends hot water round the central heating system. 热水器中的水泵将热水输送给集中供热设备。
