| 摘要 |
<p>A swing control apparatus for a boom comprising at least one rod attached to an arm, at least one sector gear attached to the arm and a translation g ear interconnected with the at least one sector gear wherein, the movement o f the rod causes movement of the arm and sector gear, resulting in movement of the translation gear which is translated into an electrical signal to the reby move the boom of the dragline excavator.</p> |
