| http://www.w3.org/ns/prov#value | - If the engaging portion 23 a of the detent spring 23 does not butt against the side wall of the holding recess 24 or 25 of the detent lever 15 even if a butting control has been performed for a long time, a certain system abnormality such as a failure of the SR motor 12 or the encoder 46 should have occurred.
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