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  2. Jack (device) - Wikipedia

    en.wikipedia.org/wiki/Jack_(device)

    A jack which can lift a mobile home. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. [1] The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be ...

  3. List of railroad truck parts - Wikipedia

    en.wikipedia.org/wiki/List_of_railroad_truck_parts

    An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

  4. Car jack - Wikipedia

    en.wikipedia.org/wiki/Car_jack

    Car jack may refer to: Jack (device) , a device for lifting (jacking up) cars and other heavy objects Carjacking , the crime of forcedly repossessing an occupied car

  5. Double-stack rail transport - Wikipedia

    en.wikipedia.org/wiki/Double-stack_rail_transport

    Another consideration is the maximum weight of a train. A maximum length train in Europe, 750 m (2,461 ft) long can have 50 container cars with a total weight of 2,250 tonnes (2,480 short tons; 2,210 long tons), and more if 20 ft containers are included. This is not far from the limit using standard European (freight) couplers. [citation needed]

  6. Hopper car - Wikipedia

    en.wikipedia.org/wiki/Hopper_car

    A hopper car (NAm) or hopper wagon (UIC) is a type of railroad freight car that has opening doors or gates on the underside or on the sides to discharge its cargo. They are used to transport loose solid bulk commodities such as coal , ore , grain , and track ballast .

  7. Refrigerator car - Wikipedia

    en.wikipedia.org/wiki/Refrigerator_car

    A refrigerator car (or "reefer") is a refrigerated boxcar (U.S.), a piece of railroad rolling stock designed to carry perishable freight at specific temperatures. Refrigerator cars differ from simple insulated boxcars and ventilated boxcars (commonly used for transporting fruit ), neither of which are fitted with cooling apparatus.