| 摘要 |
A self-restoring spring trip shank assembly of the type having a mounting element secured to a toolbar, a shank pivoted to the mounting element, and a spring acting between the mounting element and the shank to yieldably hold the shank in a working position. The spring acts on a multi-position reversible bracket secured to the shank so that by reversing the bracket the moment arm through which the spring force acts is varied and the force needed to pivot the shank upwardly is varied.
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