aligning and angle direction telescope
change vector direction cosine
search direction vector
vector direction frequency plot
Complementary Angle of Front Angle
multiple measuring lines multiple lines receiving arrangement
valley lines and ridge lines
2-D direction of arrival
2-D direction of arrival estimation
2-dimensional direction of arrival
2wire double direction
A Borel direction of largest type
a law of run in opposite direction
a law of run in the opposite direction
A new valve of electric hydraulic control exchange direction
abrupt change in direction