surging

The anti-lightning circuits with microgap surge absorber in telephones and the effect are stUdied auctested.

对电话机用的小型微隙突波吸收器防雷保护电路及其效果作了详细测试，给出了一种低压（Ｖｐ＜４００Ｖ）开始起作用、具有防雷增强型效果、对通话传输性能影响小的保护电路。