Probably, however, Franklin is most famous today for his inventions lightning conductor.但今天最使他出名的或许是他的发明.The down sides to our inventions - the wars, weapons, holocausts, pollution - these too define our being.发明的阴暗面——战争...
这些超高频能传送均衡的宽频信号.These extremely high frequencies allow proportionately wider band - width signals to be transmitted.用途: 用于超高频频率转换, 负载振荡器, 宽频放大.Purpose: UHF frequency converter, local oscillator, wide band amplifier.用途: 用...