前言我们遵照毛主席“独立自主,自力更生”的教导,打破洋框框,几年来试制出几种新类型的磁路。这类新结构磁场经过设计、定型,目前已大量投产,并在微波电子管中大量运用。过去,微波电子管多数都采用铝镍钴五类或八 Foreword We follow the guidance of Chairman Mao’s “independence and self-reliance” to break the framework and try out several new types of magnetic circuits in the past few years. This new structure of the magnetic field through the design, stereotypes, has been put into operation in large quantities, and extensive use of microwave tubes. In the past, most of the microwave tubes used Alnico five or eight