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  2. Motronic - Wikipedia

    en.wikipedia.org/wiki/Motronic

    The Motronic 1.1 and 1.3 systems are largely similar, the main improvement being the increased diagnostic capabilities of Motronic 1.3. The 1.3 ECM can store many more detailed fault codes than 1.1, and has a permanent 12-volt feed from the vehicle's battery which allows it to log intermittent faults in memory across several trips.

  3. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    FC4 – Octode Frequency Converter with a 4 V/650 mA heater and a British 7-pin base; similar to the M-OV/GEC MX40 heptode [21] Pen20 – Power Pen tode with a 20 V/180 mA heater and a British 5- or 7-pin base

  4. List of refrigerants - Wikipedia

    en.wikipedia.org/wiki/List_of_refrigerants

    For example, R-22 has one carbon atom, one hydrogen atom (2−1 = 1), two fluorine atoms, and one chlorine atom (4−2−1 = 1), so it is chlorodifluoromethane, while R-134 has two carbon atoms (2−1 = 1), two hydrogen atoms (3−1 = 2), four fluorine atoms, and no chlorine atoms (6−2−4 = 0), so it is one of the tetrafluoroethanes. This ...

  5. Deep reactive-ion etching - Wikipedia

    en.wikipedia.org/wiki/Deep_reactive-ion_etching

    DRIE of glass requires high plasma power, which makes it difficult to find suitable mask materials for truly deep etching. Polysilicon and nickel are used for 10–50 μm etched depths. In DRIE of polymers, Bosch process with alternating steps of SF 6 etching and C 4 F 8 passivation take place. Metal masks can be used, however they are ...

  6. Bosch (company) - Wikipedia

    en.wikipedia.org/wiki/Bosch_(company)

    Robert Bosch GmbH (/ b ɒ ʃ /; German: ⓘ), commonly known as Bosch (styled BOSCH), is a German multinational engineering and technology company headquartered in Gerlingen, Baden-Württemberg, Germany. The company was founded by Robert Bosch in Stuttgart in 1886. [2] Bosch is 94% owned by the Robert Bosch Stiftung, a charitable institution. [3]

  7. Worcester, Bosch Group - Wikipedia

    en.wikipedia.org/wiki/Worcester,_Bosch_Group

    Worcester's gas, oil and LPG ranges consist of regular boilers, combination boilers and system boilers; these are wall-hung, floor-standing or externally sited. Worcester's solar water heating range was released in 2005, with the ground source heat pump range being released in 2007 and the air source heat pump range being released in 2008.

  8. Bose gas - Wikipedia

    en.wikipedia.org/wiki/Bose_gas

    The thermodynamics of an ideal Bose gas is best calculated using the grand canonical ensemble.The grand potential for a Bose gas is given by: = ⁡ = ⁡ (). where each term in the sum corresponds to a particular single-particle energy level ε i; g i is the number of states with energy ε i; z is the absolute activity (or "fugacity"), which may also be expressed in terms of the chemical ...

  9. HAZMAT Class 4 Flammable solids - Wikipedia

    en.wikipedia.org/wiki/HAZMAT_Class_4_Flammable...

    Division 4.1: Flammable Solid . Flammable solids are any of the following four types of materials: Desensitized Explosives: explosives that, when dry, are Explosives of Class 1 other than those of compatibility group A, which are wetted with sufficient water, alcohol, or plasticizer to suppress explosive properties; and are specifically authorized by name either in the 49CFR 172.101 Table or ...