... vacuum tube amplifier 真空管放大器... vacuum tube characteristics 真空管特性... vacuum tube detector 真空管检波器...
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Our vacuum tube Wrapper has its own characteristics, Die casting, size and shape is very stable. Solid very conducive to the closure Poles casting.
我们的真空管包封有自己的特点，是成形模浇铸的，外形尺寸非常稳的，很利于固封极柱的浇铸。
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