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  2. Hot water extraction - Wikipedia

    en.wikipedia.org/wiki/Hot_water_extraction

    Consumer-grade extraction cleaner by Bissell. 3-liter fluid capacity; no heating element. A button on the vacuum-head dispenses the cleaning fluid (special soapwater) by air pressure. Consumer-grade and rental machines use similar technology to professional systems, but with less power and usually without an element to heat water.

  3. Bissell - Wikipedia

    en.wikipedia.org/wiki/Bissell

    Bissell Inc., also known as Bissell Homecare, is an American privately owned vacuum cleaner and floor care product manufacturing corporation headquartered in Walker, Michigan in Greater Grand Rapids. [ 3 ] [ 4 ] The company is the number one manufacturer of floor care products in North America in terms of sales, with 20% marketshare.

  4. Thermal emittance - Wikipedia

    en.wikipedia.org/wiki/Thermal_emittance

    Thermal emittance or thermal emissivity is the ratio of the radiant emittance of heat of a specific object or surface to that of a standard black body.Emissivity and emittivity are both dimensionless quantities given in the range of 0 to 1, representing the comparative/relative emittance with respect to a blackbody operating in similar conditions, but emissivity refers to a material property ...

  5. Spot welding - Wikipedia

    en.wikipedia.org/wiki/Spot_welding

    A portable spot welder. Spot welding (or resistance spot welding [1]) is a type of electric resistance welding used to weld various sheet metal products, through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric current.

  6. Biot number - Wikipedia

    en.wikipedia.org/wiki/Biot_number

    The Biot number (Bi) is a dimensionless quantity used in heat transfer calculations, named for the eighteenth-century French physicist Jean-Baptiste Biot (1774–1862). The Biot number is the ratio of the thermal resistance for conduction inside a body to the resistance for convection at the surface of the body.

  7. Heat-affected zone - Wikipedia

    en.wikipedia.org/wiki/Heat-affected_zone

    Heat-affected zone around a weld. In fusion welding, the heat-affected zone (HAZ) is the area of base material, either a metal or a thermoplastic, which is not melted but has had its microstructure and properties altered by welding or heat intensive cutting operations. The heat from the welding process and subsequent re-cooling causes this ...