direction ray目标射线
directionn.方向;指导;用法说明;趋势;目标;管理
directional drilling crossing定向钻穿越
direction-finding equipment测向设备
direction of counter-strike反突击方向
direction probability density方向概率密度
direction deviation of a hole孔斜
directional communicated well定向井连通
directional-distance filter距离方向滤波器
direction switching condition方向转换条件