The temperature inversionfrequency gets highest in winter.
冬季的逆温频率最高。
2
Maintenance-free brushless drive motor with frequencyinversion, has high start torque and short acceleration time.
免维护高力矩无刷变频电机直接驱动，启动力矩大、加速时间短。
3
The other problem in seismic inversion is that the frequency information and amplitude real value recorded by seismograph are incomplete and severely absent.