direction ray目标射线
directionn.方向;指导;用法说明;趋势;目标;管理
directional-type tricone bit定向型三牙轮钻头
Direction of hospital customer医院顾客导向
directional wavelet transforms方向小波
direction measurement locating测向定位
directional partial derivative方向偏导数
directional drilling technique定向钻进技术
directional multi-resolution方向多分辨
direction of striking position拳式方位