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The first transistor radio hit the consumer market on October 18, 1954. The Regency TR-1 featured four germanium transistors operating on a 22.5-volt battery that provided over twenty hours of life.
一旦他们有信誉积分了, 你就可以看到他们一段时间内累积的信誉积分曲线图。
曲线图预览：
还没有获得任何的信誉积分。
The first transistor radio hit the consumer market on October 18, 1954. The Regency TR-1 featured four germanium transistors operating on a 22.5-volt battery that provided over twenty hours of life.