手机经过射频电波(一种与调频电波和微波类似的能量方式)，将信号发送至左近的信号塔。
Cellphones send signals to nearby towers via radio frequency waves, a form of energy similar to FM radio waves and microwaves.
经过DCS与变频控制技术的结合应用与研究，实现了生产过程控制中调频电机与调节阀的无扰动切换。
Integrating application and research technology of DCS and frequency inverter, realize switchover without interference between control valve and frequency-inverter motor in producing process control.
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