commercial power frequency 中文意思是什麼
commercial power frequency
解釋
市電頻率- commercial : adj 1 貿易的，商業上的；營業性的。2 〈美國〉（能）大量生產的；營利（性質）的；面向市場的；〈美國...
- power : n 1 力，力量；能力；體力，精力；（生理）機能；〈常 pl 〉才能。2 勢力，權力，權限；威力；政權；權...
- frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
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Rubber, vulcanized - determination of electrical breakdown strength and voltage resistant at commercial power frequency
硫化橡膠工頻擊穿電壓強度利耐電壓的測定方法 -
Abstract : to against the fact of the commercial available white noise generators are very expensive which is not good for general operations, a simple and effective limited band white noise generator is design. the generator is using the feature of dual polarity transistor, i. e., the power spectrurn density of particulate noise is not related to frequency in very wide band and close to white noise. the concrete circuit is also given
文摘:針對市售白噪聲發生器價格昂貴，不利於一般場合使用的問題，介紹利用雙極性晶體管散粒噪聲功率譜密度在非常寬的范圍內與頻率無關，屬白噪聲這一特性，設計了一種簡捷、有效的限帶白噪聲發生器，並給出了具體電路。 -
Power line communication apparatus and systems used in low - voltage installations in the frequency range 1, 6 mhz to 30 mhz - residential, commercial and industrial environment - immunity requirements
用於頻率在1 ， 6 mhz到30 mhz的低壓安裝的輸電線通信設備和系統.住宅商業和工業環境.抗干擾性要求 -
Power line communication apparatus and systems used in low - voltage installations in the frequency range 1, 6 mhz to 30 mhz - part 2 - 1 : residential, commercial and industrial environment - immunity requirements
在1 . 6 30mhz頻率范圍低壓設備中使用的電力線通訊裝置和系統.第2 - 1部分:居住商業和工業環境.抗擾度要求
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