| 摘要 |
<p>A system includes a motor coupled to an energy source and coupled to a hoist pump. During one mode of use or operation, the motor can receive electricity from the energy source and provide mechanical power to the hoist pump. A method includes directing a motor to mechanically couple to the hoist pump, and directing electrical power to flow from an energy source to the motor, and thereby to control the speed of hoist activity.</p> |
