Apply power to heater only after the tank is completely filled with water.
只能在热水器完全注满水后才能够接通电源。
After electrical heater running properly, we can clean the filter periodically.
电加热器正常运行后，可定期清洗过滤器。
After adopting the structure, the flash heater needs no heat steam for heating and saves energy.
采用了这种结构后，不必用热蒸汽加热，节约了能源。
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