| http://www.w3.org/ns/prov#value | - e film is positive or negative by the image sensor S. While the image sensor S moves in the reverse direction from position a2 to home position a1, the image is read by the image sensor S. Switching between the forward and reverse directions of the motor 52 is performed by detecting the position of the moving platform 40 by a sensor, such as a switch or the like.
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