A-bomb,H-bomb and nuclear-powered submarine是什么意思

用法例句

It was the most useful in the engineering that the contact pressure problem when two elastic cylinders crossangle is less than 20, but in the existing data the relation of the concerned coefficient can not be found.

两弹性圆柱体轴线在交叉角小于20°时的接触压力问题在回转窑中最有用,但是在现有的资料中查不到有关的系数值。

this paper presents a two-spring-two-freedom vibration system.

设计了二自由度两弹簧振子系统,并进行了系统理论模态分析与ANSYS仿真,通过激振实验对系统进行了频率响应特性和模态分析,研究了系统振动动态特性测试。