自20世纪20年代初国外第一台石英晶体振荡器问世至今，石英晶体振荡器技术已经日渐成熟，应用范围也越来越广泛。
Since the first crystal oscillator came out in the early 1920s, the technique of crystal oscillator has been greatly improved and has been widely used.
自20世纪20年代初国外第一台石英晶体振荡器问世至今，石英晶体振荡器技术已经日渐成熟，应用范围也越来越广泛。
Since the first crystal oscillator came out in the early 1920s, the technique of crystal oscillator has been greatly improved and has been widely used.
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