directional focusing  方向聚焦; 指向聚焦; 定向聚焦

double-directional focusing  双向聚焦

two-directional energy-focusing cutter  双向聚能切割器

all-directional continuance and all-directional in  全方位成像理论

horizontal directional drilling horizontal directional drilling technology  水平定向钻进技术

3D and 4-directional braiding  三维四向

3-D directional well  三维定向井

3-D five-directional  三维五向

3D five-directional  三维五向

3-directional seismic base excitation  三向地震输入

8-directional chain code  8方向链码编码

active field directional ranging  有源导向测距

adaptive directional algorithm  自适应指向性算法

Adaptive Directional Filter  方向自适应滤波

adaptive directional line differential protection  自适应方向纵差保护

adaptive directional weighted median filtering  ADWM滤波

advance directional sign  方向预告标志; 前置指路标志

air directional drilling  空气正循环钻井; 数据显示RAM

all-directional M-mode echocardiography system  全方向M型心动图

all-fiber component directional coupler  全光纤组件方向藕合器; 全日效率