变速箱方向线圈
transmission directional solenoid
地震射线方向异常
seismic ray direction anomaly
法线方向面形
figure on normal direction
反方向线
3-Hydroxyl-2-Naphthlenecarboxylate
方向线偏移法
deflection of direction method
方向线素
directional line element feature
方向线素特征
directional line element feature
封闭曲线方向
orientation of closed-curve
俯仰向天线方向图在轨测试
In-orbit determination of antenna elevation patter
航线方向指示器
course and bearing indicator
恒向线方位
Mercatorial bearing
rhumb line bearing {= RLB