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英语例句库

Brazing quality and product reliability are both increased as using high frequency pulse microplasma arc heating process for assembly brazing of cathode and photoetching grid of electron tube.

采用高频脉冲微束等做为电管阴极和刻栅极装配钎焊工源,提高了钎缝质量和产品可靠性.

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原声例句
Science Fiction - Daily Short Stories

They stepped into a little cell, completely surrounded with mirrors and vast prisms and lenses and electron tubes.

他们走进了一个，四周全镜子，还有的棱镜、透镜和电子管。

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