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micro-vacuum electron device 微型真空电子器件
The High Power Microwave (HPM) technology as a combination of pulse power technology, plasma physics and vacuum electron device is a rising science in the 1970s.
高功率微波（HPM）技术是上世纪70年代以来产生的一门新兴学科，是脉冲功率技术与等离子体物理学及电真空技术相结合的产物。
An electron tube is generally used for amplification, and vacuum tube is another term for this device.
电子管通常用来放大，而真空管则是电子管的另一名称。
The flow resistance device is a important unit for achieving electron beam welding in partial vacuum.
气阻装置是实现低真空电子束焊接的重要部件。
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