基线: base line; ground line; base方向: direction; orientation基线方程: base line equation基线方程式: base equation基线方位: basic side azimuth出线方向: direction of outgoing line法线方向: normal direction光线方向: direction of light航线方向: course direction恒向线方向: mercator direction螺线方向: hand of spiral马赫线方向: mach direction切线方向: umfangsrichtung circumferential /having to do with circumference绕线方向: direction of winding; winding direction视线方向: line-of-sight direction天线方向图: aerial polardiagram; aerial radiation pattern; antenna radiation pattern; antenna directional pattern; antenna directivity diagram; antenna pattern; scanning cone天线方向性: aerial directivity; antenna directivity; directivity diagram of an antenna; directivity of antenna; directivity; antenna直线方向: line direction; rectilinear direction轴线方向: axial direction; axis direction主法线方向: principal normal direction切线方向的力: force o fperiphery; force of periphery曲线方向反向: reverse direction天线方向性图: antenna directivity diagram; antenna directivity pattern沿直线方向的: lengthwise变压器绕线方向: polarity of transformer