| http://www.w3.org/ns/prov#value | - In addition, a first rack 34 having a toothed portion and a second rack 36 having a toothed portion are formed inside the size adjusting portion 30 in such a manner as to face each other, the second rack 36 being formed shorter than the first rack 34 with respect to a length oriented downwards as viewed in FIG. 4.
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