anomaly of geomagnetic declination
Declination
偏角
赤纬
磁
偏
偏差
倾斜
下
磁偏罗盘
等偏线
磁偏图
无偏线
井斜
磁偏角
赤纬[天]
偏流
偏斜
递降曲线
偏角〔地磁〕
方位角
Declination Determination
declination of kidney yang
declination of magnetic needle
declination of remenantmagnetization
declination of the boundary
expected magnetic declination