| 摘要 |
Lifting tongs for a crane include a pair of tong arms pivoted together adjacent their centers. A tension spring biases the tongs into a closed position and a hydraulic cylinder moves the tongs opened and closed. A substantially V-shaped jaw is mounted on the lower end of each tong arm and is pivotally adjustable to accommodate various size workpieces. An alternative pair of jaws for lifting cylindrical members such as logs is also provided.
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