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  2. GE Dash 9 Series - Wikipedia

    en.wikipedia.org/wiki/GE_Dash_9_Series

    The orders for these units were basically an extension of NS's previous order for the standard cab Dash 9-40C (or C40-9) (see above). They were built under the same premise that a lower power rating than the 4,400 hp (3,300 kW) rating of the Dash 9-44CW (or C44-9W) (see below) would prolong the life of the engine, and use less fuel.

  3. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.

  4. Autocar U8144T 5- to 6-ton 4×4 truck - Wikipedia

    en.wikipedia.org/wiki/Autocar_U8144T_5-_to_6-ton...

    The U8144T tractor was used to tow semi-trailers with 10-ton or 25-ton ponton bridging equipment. Directly behind the cab was a large toolbox. [25] [26] 2,711 were built between 1941 and 1945, of which 42 went to the Soviet Union under the Lend Lease Act. [27] The U8144 had a similar chassis with van bodies built by York-Hoover.

  5. AAON - Wikipedia

    en.wikipedia.org/wiki/AAON

    AAON was founded in 1988 when Norman H. Asbjornson set out to create a commercial HVAC company that designed and manufactured semi-custom equipment that would excel in performance relative to the market. [2]

  6. Carrier Global - Wikipedia

    en.wikipedia.org/wiki/Carrier_Global

    Willis Carrier, a mechanical engineer working for Buffalo Forge, is credited with inventing modern air conditioning in July 1902. [6]In 1908, the Carrier Air Conditioner Company of America was created as a subsidiary of the Buffalo Forge Company, with Willis Carrier as its vice president.

  7. List of roof shapes - Wikipedia

    en.wikipedia.org/wiki/List_of_roof_shapes

    Towers, especially church towers, frequently feature special roof shapes: (1) Conical roof, (2) Concave conical roof, (3) Dome, (4) Gable roof, (5) Hip roof, (6) Mansard roof, (7) Helm roof, (8) Rhenish helm, (9) Folding roof, (10) Cross roof, (11) Broach spire, (12) Tented roof, (13) Concave tented roof, (14) Cloister vault, (15) Bell roof, (16) Onion Dome, (17) Welsh spire

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