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Giáo trình Anh văn chuyên ngành điện

Electronics began at the start of the twentieth century with the invention of the vacuum
tube. The ﬕrst devices for everyday use were radios, followed by televisions,record
players,and tape recorders. These devices were large and used a lot of power.
The invention of the transistor in 1947 meant that much smaller, lowpowered
devices
could be developed. A wide variety of electronic devices such as hi-fl units and
portable

Từ khóa: tiếng anh chuyên ngành điện, điện tử, điện

17 p minhhoai 27/12/2012 1725 128

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