| 摘要 |
PROBLEM TO BE SOLVED: To provide an outlet in which two or more tooth rests can be used without any waste. SOLUTION: Another pair of tooth rests are provided in a position which is rotated for 90°with the center of a projecting board as a center point against a pair of tooth rests provided on one projecting board of the outlet. COPYRIGHT: (C)2006,JPO&NCIPI
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