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You asked:

what are levers and linkages

  • piece of equipment, product, property, object with a length, retailable device, machine, [item with description], result of human ingenuity, visible object, thing that was created, object with a geographical location, physical object, mechanical system, retailable manufactured item, object with a height, inanimate object, manufactured product, object with a length or height, individual object, object classified by physical property, retail product, object with a mass, multi-part manufactured item, manufactured item and device.
  • piece of equipment
    piece of equipment
    piece of equipment

    piece of equipment (any manufactured item used to perform specific tasks)

  • product

    product (a saleable commodity)

  • property

    property (something owned; any tangible or intangible possession that is owned by someone)

  • object with a length

    object with a length (one where it makes sense to talk of its length)

  • retailable device

    retailable device (a device that could plausibly be sold to the public in a retail environment)

  • machine

    machine (any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks)

  • [item with description]

    [item with description] the class

  • result of human ingenuity

    result of human ingenuity (something created by the use of someone's imagination)

  • visible object

    visible object (something which reflects or emits light)

  • thing that was created

    thing that came into existence at a particular point in time