...保个人负担多少一般来说，我司在PCB制作时用的板材主要有FR4，玻纤布环氧CCL；CEM-3，复合基CCL；高频板（High Frequency Board）及铝基板，至于选材最主要的还是按客户要求。
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The Radar package board is an one-sided, high frequency board, which is mixed rags with multiple kinds of surface mounting components.
雷达组件板是多品种器件表面混装的单面高频板。
The two companies offer high-frequency service between major U.S. cities and wireless Internet service on board.
这两家公司主要经营大城市间的客运业务，车次频繁，而且提供车内无线上网服务。
The high turn-on frequency permission selects the small superficial ceramics electric capacity, may save the board level area, reduce the cost and to reduce the output voltage ripple.
高的开关频率允许选用小的表面瓷陶电容，可节省板级面积、降低成本和减小输出电压纹波。
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