For example: Diving deep-wellpump or pump water directly from the ground floor of the boiler heating system users frequency constant pressure replenishment system.
例如：用深井泵或潜水泵直接从地下取水的用户供热系统锅炉变频定压补水系统。
3
They supply the energy for a submersible pump that pumps the water up from a well that is 105 feet deep and for a small desalination unit that satisfies farmers' potable water requirements.