ringing test 中文意思是什麼
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Technical requirements and test methods for ringing, power sources, alarm and distribuing frame in manual toll telephone switching equipments
人工長途電話交換設備鈴流電源告警配線設備技術要求和測試方法 -
Q - switching test of e - o modulator was carried out, the results displayed regular rectangular optical pulse figuration without any acoustic ringing, the leading and trailing edges is 5 ns
製作的電光開關的光斬波實驗,結果顯示出正常的矩形開關光脈沖,上升和下降沿都是5ns ,看不出任何振蕩現象。 -
The test methods for the technical specifications of ringing and tone for automatic telephone switching network
電話自動交換網鈴流和信號音技術指標測試方法
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