| 摘要 |
This apparatus is comprised of a leading bar(4) attached to move freely with pin(3) on the face plate(1') of quadrangular column(1), following bars(5)(5')(5") stuck to flutes (2)(2')(2") on leading bar(4) at their one side, cylinder (7) connected between following bar(5") and face plate(1'), rack gear(10) and pinion gear(9) connected cylinder(7').
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