A mechanical movement includes a frame adapted to move only along a linear path of travel. 机械运动包括一个适合于只沿着直线运动的框架。
The results show that the controlable positive linear movement of the mechanism is realized under the excitation of the symmetric square wave signals. 结果表明，机构在方波这种对称波形信号的激励下能够实现可控的正向直线运动。
