direction ray目标射线
directionn.方向;指导;用法说明;趋势;目标;管理
direction changing mechanism转向机构
direction finder calibration测向器校正
directional pulse modulation定向脉冲调制
directional scanning antenna定向扫描天线
direction of decisive battle决战
Directional cost aggregation方向能量聚集
direction-annexed traverse方向附合导线
Direction of static friction静摩擦力的方向