该弹性波元件抑制弹性波的传播特性的变动，具有高可靠性。
The elastic wave element suppresses variation in propagation characteristics of the elastic wave and exhibits high reliability.
由于采用了较高的斩波频率和新颖的控制策略，减小了滤波元件的尺寸，并降低了IGBT的开关损耗。
With high chopping frequency and novel control strategy, the size of filter elements is reduced and switching loss of IGBTs drops.
用于电子元件特别是声学表面波元件的多路印刷线路板以及在多路印刷板上构造针脚焊点，焊接架，隔片等的方法。
Multiple printed circuitboard for electronic components esp. acoustic surface wave elements, and method for constructing bumps, soldering frames, spaces on said multiple printed circuitboard.
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