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  2. Humphrey pump - Wikipedia

    en.wikipedia.org/wiki/Humphrey_Pump

    A single 66" diameter pump was installed at Del Rio, Texas in 1914. [10] This was constructed by the Humphrey Gas Pump Co. of Syracuse, NY, who had licensed the Humphrey patents. [5] A single Humphrey pump was installed at a Sewage works in Southend-on-Sea, England during 1914. The pump had head of 65 ft at a capacity of 198,000 gallons per day.

  3. Concrete pump - Wikipedia

    en.wikipedia.org/wiki/Concrete_pump

    A concrete pump is a machine used for transferring liquid concrete by pumping. There are different types of concrete pumps. A common type of concrete pump for large scale construction projects is known as a boom concrete pump, because it uses a remote-controlled articulating robotic arm (called a boom) to place concrete accurately. It is ...

  4. Ground source heat pump - Wikipedia

    en.wikipedia.org/wiki/Ground_source_heat_pump

    A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

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