magnetic c declination磁偏角
magnetic needle declination磁针偏角
magnetic sensor declination磁探头偏差
expected magnetic declination磁偏角期望值
Movement of Magnetic Declination并做成动画
correction of magnetic declination磁偏角校正
Magnetic declination variometers磁偏角磁变仪
digital magnetic declination model磁偏角数字模型
MAG DEC Magnetic Declination磁偏角;磁偏移
N（名词） the angle that a compass needle makes with the direction of the geographical north pole at any given point on the earth's surface 磁偏角 (Also called declination, magnetic variation)