The invention also provides a toothbrush with the longitudinalshaft.
本发明还提供了一种具有纵轴的牙刷。
2
The natural longitudinal or torsional vibration of a wedge-shaped shaft is studied with perturbation method. The vibration mode function and the frequency characteristic equation are derived.
采用摄动法研究了楔形杆轴的固有纵扭振动，并且推导出了其固有纵扭振动的振型函数及频率特征方程。
3
Essential shape of the small turning shaft parts is analysed, the united mathematical model is put forward and applied to describing these parts longitudinal automatic single spindle lathe.