In general, a foot valve can be mounted if the pump is mounted above the water level of the water inlet so as to start the pump with priming, it can also use the way of vacuum pump water leading.
如水泵安装在进水水位以上时，为了灌泵启动，一般可装底阀，也可采用真空泵引水的方法。
2
When the level exceed limited height, the alarm send signals to start self-priming pump drain.
当水位超过限制高度时，发出信号启动自吸泵排水。
3
Methods: Twenty-five dyslexic children and 50 control subjects (25 matched with chronological age and 25 matched with reading level) completed a masked picture priming experiment of pictorial stimuli.