closed feed water heater 密封给水加热器 ; 闭式给水加热器 ; 密闭给水加热

closed-feed water heater 闭式给水加热器

closed-feed water 密闭式给水

closed feed water system 闭式给水系统

semi-closed feed water system 半封闭式给水系统 ; 半闭式给水系统

closed feed-water heater 密闭给水加热器

closed water feed 闭路供水