• A mechanical device or element that serves to position objects. For example, an access arm in a computer disk drive.
  • A mechanical device or element which has multiple positions.
  • A path within a circuit or network. Also called leg, or branch (2).
  • In robotics, a set of links and powered joints which comprises all the parts of the manipulator, except for the wrist and the end-effector. Also called robot arm.

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