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  2. Grohe - Wikipedia

    en.wikipedia.org/wiki/Grohe

    The first order from outside of Germany came in 1938. In 1948, the company was renamed to Friedrich Grohe Armaturenfabrik. [3] In 1956, Grohe purchased Carl Nestler Armaturenfabrik, with a factory in Lahr/Schwarzwald. [4] In the same year, the company launched the Skalatherm, an automatic mixing valve with integrated thermostat. [5]

  3. Solar thermal collector - Wikipedia

    en.wikipedia.org/wiki/Solar_thermal_collector

    The term "solar collector" commonly refers to a device for solar hot water heating, but may refer to large power generating installations such as solar parabolic troughs and solar towers or non-water heating devices such as solar cookers or solar air heaters. [1] Solar thermal collectors are either non-concentrating or concentrating.

  4. Sun valve - Wikipedia

    en.wikipedia.org/wiki/Sun_valve

    Sun valve designed by Gustaf Dalen, 1912, TM34299 - Tekniska museum - Stockholm. A sun valve (Swedish: solventil, "solar valve") is a flow control valve that automatically shuts off gas flow during daylight. It earned its inventor Gustaf Dalén the 1912 Nobel Prize in Physics. Subsequently other variants of sun valve were developed for ...

  5. Josef Grohé - Wikipedia

    en.wikipedia.org/wiki/Josef_Grohé

    Grohé was born the son of a farmer and shopkeeper. [1] He tried to join the Imperial German Navy during the First World War in 1918, but was refused for being underage. [2] He attended business school from 1919 to 1921 and worked as a clerk in the hardware industry.

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