If user combines the two in actual operating process, frequency of mechanical rapping can be reduced and the impact on heating surface welded junction of mechanical rapping position can be relieved.

如用户在实际运行过程中两者结合使用，可减少机械振打的频率，减轻对机械振打部位的受热面焊口的冲击。

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Semiconductor diodes bipolar junction transistors field-effect transistors transistor amplifiers frequency response operational amplifiers differential and multistage amplifiers integrated circuits.

半导体、二极体、双极电晶体、场效电晶体、电晶体放大器、频率响应、算放大器、差动及多极放大器、积体电路。

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These threedimensional geometry can be conveniently fabricated, and it has higher sensitivity on the high frequency response, that has smaller area of the junction.

这种三维结构隧道结和桥型结制作方便。其中，小面积隧道型和桥型三维点接触具有较好的高频性能。

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