non-directional transimitter
all-directional continuance and all-directional in
horizontal directional drilling horizontal directional drilling technology
3D and 4-directional braiding
3-directional seismic base excitation
8-directional chain code
active field directional ranging
adaptive directional algorithm
Adaptive Directional Filter
adaptive directional line differential protection
adaptive directional weighted median filtering
advance directional sign
air directional drilling
all-directional M-mode echocardiography system
all-fiber component directional coupler
aluminum directional configuration