跳至内容

搜索结果

2 results for "index.php"

实现 6G 通信的可能是铟而非硅

The rollout of wireless communication networks began back in 1979 when Nippon launched the first commercially automated mobile network, known today as the first “Generation” (1G). It launched in Tokyo, but soon covered the whole population of Japan.

焊接的奇迹

Folks, Imagine you are Guglielmo Marconi, and you opened the first radio factory in Chelmsford England in 1912. Using Lee De Forest’s 1906 invention, the triode vacuum tube, your early radios needed a way to connect the various electronic components together. Enter soldering.