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真空电子器件封离
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真空电子器件封离
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真空电子器件封离
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sealing technique of vacuum electronic device
真空电子器件封离
在真空电子器件排气过程终了,管内气体压强达10-5帕以下时,将器件与排气系统分开并保持密封的过程。
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