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hard vacuum tube造句

"hard vacuum tube"是什么意思

造句與例句手機(jī)版

These types were the first true hard vacuum tubes; early diodes and triodes performed as such despite a rather high residual gas pressure.
It's difficult to see hard vacuum tube in a sentence. 用hard vacuum tube造句挺難的

相鄰詞匯

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如何用hard vacuum tube造句，用hard vacuum tube造句，hard vacuum tube in a sentence, 用hard vacuum tube造句和hard vacuum tube的例句由查查漢語(yǔ)詞典提供，版權(quán)所有違者必究。