双靶定向井
Double target directional well
定向井井口水平力
horizontal force of directional wellhead
超细定向柱晶
superfine directional columnar grains
第二代定向柱晶
2nd generation DS superalloy
旋转柱状靶
rotating cylindrical target
定向区域攻击锚雷
directional attack anchored mine
大位移定向井
extended-reach directional well
单井定向天线
directional antenna in single well