它是三极管放大器的等效电路.It is the equivalent circuit of a triode amplifier circuit.三极管能升高电压.The triode steps up voltage.三极管接法): 中Mu小型灯丝结构.U 4 triode connected: Medium MU small mass filamentary heating structure....

“三极管”的英语可以翻译为：dynatron，[化] triode，audion ...