| http://www.w3.org/ns/prov#value | - As a result of this sliding movement, the operating plate 79 reaches such a position as shown in FIG. 25, wherein the slits 88 lie just under the hook receiving holes 77, and the locking hooks 85 are turned by the coiled springs 87 in the hook receiving holes 77 counterclockwise in FIG. 25 until their backs 85d come into abutment with the stoppers 88a in the slits 88.
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