Everything depended ultimately upon the driving power of human muscle, the muscle of ignorant and subjugated men . 事事最终要靠愚昧的驯从者的肌肉的推动力。
Driving power for the cutting tool comes from the rotation of the spindle, which is a hollow shaft that rotates in bearings . 刀具的驱动力来自主轴的旋转,主轴则是一根在轴承中旋转的空心轴。
9 maximum lifting capacity of top drive power head 45 kn 9动力头最大起拔力45kn
9 maximum lifting capacity of top drive power head 30 kn 9动力头最大起拔力30 kn
10 maximum thrust force of top drive power head 30 kn 10动力头最大给进力30 kn