Single-stage four-element 单级四元件
four element electronic speed switch 四元电子速度开关
four element system protection valve 四元系统安全防护阀
four element theory 四元素说
four-element theory 四元素说
Four Element 四元素论
four element graph 四要素图
four-element model 四元件模型
It gave the process design of four-element light rare earth separation and showed the result of dynamic equilibrium imitation by computer.
并以四组分的轻稀土分离为例进行了工艺设计，同时给出了计算机对该工艺的动态平衡模拟结果。
Considering the problems facing by the localization method for widely used four-element cross array, a five-element cross array scheme is proposed.
针对广泛采用的平面四元十字阵定位方法存在的固有缺点，提出了基于五元十字阵的低空目标声测无源定位算法。
Based on the four-element model, the equation of the stress relaxation process is developed using the principle of Boltgation superposition in this paper.
以四元件模型为基础，利用玻尔兹曼叠加原理建立了纱线应力松弛变化过程的理论方程，并分别对彩棉喷气涡流纺及环锭纺纱线进行松弛实验。
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