Use the method of the frequency governor with machine speed. Bring about a stepless regulation of all constant power range, in the rotating main movement of universal machine tools.
用变频调速和机械变速相结合的方法，在主运动为旋转运动的通用机床中，实现全部恒功率范围内的无级调速。
This frequency range is proximate to main vibration frequency of the traction machine at rated speed, and, according to this, measures against elevator resonance are proposed.
并针对该频率区与曳引机主机额定转速———主振频率接近的特点，提出了防止电梯发生系统共振的措施。
Increase of detection range and fast precision tracking are main difficulties in weak aerial target detection for High Frequency Surface Wave Radar (HFSWR).
增大探测距离、快速精确跟踪是高频地波雷达探测飞行小目标所面临的主要困难。
It is found that the main effect of self steepening is the reduction of the growth rate and the frequency range over which the gain occurs.
发现自变陡效应使增益谱的谱宽变窄、振幅的增长速度减慢，而且其影响程度与色散缓变参量有关。
The results show that the main amplitude, main frequency and frequency band of reflected wavelet and the effective dynamic range of system have different degrees of increase.
结果表明，改进后仪器接收到的地震反射波主振幅、主频率、频带宽度、垂向分辨率及仪器记录信号的有效动态范围均有不同程度的提高。
The results show that the main amplitude, main frequency and frequency band of reflected wavelet and the effective dynamic range of system have different degrees of increase.
结果表明，改进后仪器接收到的地震反射波主振幅、主频率、频带宽度、垂向分辨率及仪器记录信号的有效动态范围均有不同程度的提高。
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