Single-stage four-element 单级四元件
four element infrared objective 四维元红外物 ; 四通道多光谱带照相机
Steiner four-element Steiner四元组
four element system protection valve 四元系统安全防护阀
four element electronic speed switch 四元电子速度开关
four-element Burger model Burgers四元件模型
four element theory 四元素说
four-element theory 四元素说
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。
This four-element architecture may be caused by a regional stress field evolution from rifting, sagging to differential inversion uplifting.
这种四元结构的形成，起因于区域构造应力场转变成裂陷作用、拗陷作用和差异隆升反转作用的演化。
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。
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