qcfo quartz crystal frequency oscillatorquartz crystal frequency oscillator石英晶体: quartz crystal频率: frequency; rate振荡器: oscillator; generator; alter ...石英晶体振荡器: quartz crystal oscillator; quartz oscillator; quartz-crystal oscillator; quartzoscillator石英晶体频率校准仪: quartz crystal calibration equipment下载手机词典可随时随地查词查翻译