| 摘要 |
<P>PROBLEM TO BE SOLVED: To operate a middle frame in a closed state from a front part while keeping the front frame closed. Ž<P>SOLUTION: When the middle frame 33 is not operated in the closed state in the closed state of the front frame 4, the operation part 46 of the middle frame 33 is protruded forward through the window 43 of the front frame 4. Thus, it is identified that the middle frame 33 is not operated in the closed state, according to the fact that the operation part is protruded to the front of the front frame 4. The middle frame 33 is operated in the closed state by pushing-in backward the operation part 46 while keeping the front frame 4 closed. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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