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  "abstract": "The robot system including a 6-axis robot has a swingable arm for transferring a workpiece between first and second positions, a wrist on a distal end of the arm, that is driven to rotate around a predetermined axis, and a transfer device at the wrist. The transfer device has a link mechanism having first and second links and holding means attached to a distal end of the second link. A proximal end of the first link is attached to the wrist so as to rotate around the predetermined axis. A distal end of the first link and a proximal end of the second link are rotatably connected to each other. In accordance with a swinging motion of the arm, the first link rotates in a first rotational direction with respect to the arm and the second link rotates in a second rotational direction opposite to the first rotational direction with respect to the first link, so as to transfer the workpiece along a straight line linking the first and second positions.",
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