isogonic map等磁偏线图
line isogonic等偏线
isogonic method等偏法
isogonic tranformation等角变换
isogonic mapping等角测绘;等电子数序
isogonic line等磁差线;[地物] 等偏线;[地物] 等磁偏线;等偏差线
isogonic lines等磁偏线;等偏线
isogonic tranaccumulation等角变换
isogonic chart等线图;等磁差图;等磁偏线图
ADJ（形容词） having, making, or involving equal angles 等角的 [maths]
N（名词） an imaginary line connecting points on the earth's surface having equal magnetic declination 等磁偏线 (Also called isogonic line, isogonal line, isogone) [physics]