tank bottom heater 箱底加热器
bottom hole heater 井底加热器
bottom m hole heater 井底加热器
dual convection bottom-side heater 双对流底侧加热器
Drain out 5 gallons of water from the drain valve at the bottom of the heater.
从热水器底部的排污阀排出大约5加仑的水。
Combustion of gas or oil fuel occurs in burners at the bottom of the heater.
在加热炉的底部，燃料油或天然气通过燃烧器燃烧。
Emulsion enters the inlet near the bottom of the heater, is heated by the central flue, and is discharged at an outlet near the top of the heater.
乳状液由加热炉底部附近的入口进入，被中心烟道加热后由加热炉顶部附近的出口排出。
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