The rapidly quenched copper alloys containning high density vacancies produced helical dislocations during aging.
具有高浓度空位的急冷合金在时效过程中产生了蜷线位错。
<Abstrcat>From several aspects,the paper analyzed the characteristics of old road and the principle of reconstruction,and proposed its investigation,design and the determination of the location.
分析了原有公路的特点和进行改造的原则,提出了对原有公路改造的勘察与设计观点,尤其对平原微丘区及山岭重丘区线位的确定提出了自己的看法。
