A highly evacuated electron tube containing an anode, a cathode, and a control grid.
三极管带有阳极，阴极和控制栅极的高真空的电子管
Brazing for assembling cathode and photoetching grid of electron tube using high frequency pulse plasma flame
电子管阴极和光刻栅极的高频脉冲等离子弧钎焊
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