| 摘要 |
<p>A power shovel generally including a body, a stiffleg pivotally connected at a lower end thereof to the body, a hoist frame pivotally mounted on the upper end of the stiffleg, a dipper handle pivotally connected at its inner end to the hoist frame, a dipper pivotally connected to the outer end of the dipper handle, a hoist link pivotally connected at one end to the hoist frame and at the other end thereof to the dipper, means for crowding the dipper and means for hoisting the dipper.</p> |
