| 摘要 |
A fluid-operated wrench has a reciprocable driving element having a driving end, and a lever arm element pivotable about an axis and having a connecting end pivotably connected with the reciprocable driving element by means of opening provided in the one end of one of the elements and having one straight side, and a sliding member having a side which slides over the straight side of the opening and being pivotably connected with the other element.
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