<正>The organic gel-thermal reduction process was successfully used for the preparation of magnetic metal Ni,Fe,Fe-Ni fi......

主要阐述直升机回避区曲线的试验确定方法，分析了影响回避区曲线的各种因素，导出了回避区曲线与直升机的自转性能，总距操纵应和着陆装......