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。
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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