垂直自动气电焊
vertical auto-electrogas welding
垂直自然带
natural vertical zone
mountain altitudinal belts
the natural vertical zone
相对垂直加速度
Relative vertical acceleration
相对垂直螺旋度
Relative vertical helicity
相对垂直涡度
relative vertical vorticity
CCD激光自准直测量
CCD laser collimation measure
光电式自准直仪
Electronic autocollimator
光电自准直
opto-electronic auto-collimation
photoelectric auto-collimating
光电自准直仪
Photoelectric autocollimator
Photoelectric autocollimators
AUTOCOLLIMATOR
photoelectric auto-collimator
激光自准直测量
Laser auto-collimation measurement
激光自准直经纬仪
laser autocollimator theodolite