爆扩工艺
the technique of expanding
扩展加工工艺树
expansion processing tree
热扩工艺制度
Hot-expanding process schedule
钻孔扩孔
bore hole drilling and enlarging
侧壁冲孔工艺
side panel piercing technology
出芯工艺孔
Technology hole for core cleaning
封孔工艺管理
sealing process managemnt
铰孔工艺
coupling hole reaming process
气举反循环钻孔工艺
air-pump-reverse drilling technique