torsional frequency

例句：

1. 1.The torsional vibration of the spring is measured by a torsiometer.
   弹簧的扭转振动通过扭力计测量。
2. 2.The torsional vibration of the spring is measured by a torsiometer.
   弹簧的扭转振动通过扭力计测量。
3. 3.The torsional vibration of the spring is measured by a torsiometer.
   弹簧的扭转振动通过扭力计测量。