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  2. File:Dih 4 Cayley Graph; generators a, b; prefix.svg - Wikipedia

    en.wikipedia.org/wiki/File:Cayley_Graph_of...

    Description: The same file with right action (which is more usual for Cayley graphs).. One of the Cayley graphs of the dihedral group Dih 4. This version of File:Dih 4 Cayley Graph; generators a, b.svg uses prefix notation, which is unusual for Cayley graphs.

  3. Eberspächer - Wikipedia

    en.wikipedia.org/wiki/Eberspächer

    In Tianjin, China, high-voltage water heaters and low-voltage air heaters, among other things, have been manufactured since 2018. [14] With completion in 2023, a new plant in Ruse, Bulgaria will serve as an additional site for the production of electrical heaters. [15] Eberspächer PTC coolant heater 3rd Generation

  4. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.

  5. File:Tanabe Sugano Diagram d4.svg - Wikipedia

    en.wikipedia.org/wiki/File:Tanabe_Sugano_Diagram...

    English: The Tanabe–Sugano diagram for a d 4 transition metal ion. The energies are calculated using a Racah C = 4.5 B, and only selected states are depicted. The multiplicity of the ground state switches from a quintet to a triplet at the vertical line.

  6. Electric heating - Wikipedia

    en.wikipedia.org/wiki/Electric_heating

    30 kW resistance heating coils This radiant heater uses tungsten halogen lamps. Electric heating is a process in which electrical energy is converted directly to heat energy. Common applications include space heating, cooking, water heating and industrial processes. An electric heater is an electrical device that converts an electric current ...

  7. Feedwater heater - Wikipedia

    en.wikipedia.org/wiki/Feedwater_heater

    A Rankine cycle with two steam turbines and a single open feedwater heater. A feedwater heater is a power plant component used to pre-heat water delivered to a steam generating boiler. [1] [2] [3] Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system ...

  8. Volvo Engine Architecture - Wikipedia

    en.wikipedia.org/wiki/Volvo_Engine_Architecture

    The Volvo Engine Architecture [13] (VEA) is a family of straight-three and straight-four automobile petrol and diesel engines produced by Volvo Cars in Skövde, [30] Sweden, since 2013, [31] Zhangjiakou, [32] China, since 2016 [33] and Tanjung Malim, Malaysia, since 2022 by Proton. [34]

  9. D4 polytope - Wikipedia

    en.wikipedia.org/wiki/D4_polytope

    They can also be shown in perspective projections of Schlegel diagrams, centered on different cells. D 4 ... (D4), George Olshevsky. D 4 uniform polychora {3,3 1,1 ...