constant pressure

详细解释:【建】 恒压

例句：

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