钻孔扩孔
bore hole drilling and enlarging
根管扩大
Widening of root canal
nerve root canal enlargement
手持根管扩大器械
hand endodontic instrument
塔波特根管扩大针
Talbot s root canal reamer
扩孔钻和锥管丝锥复合刀具
combined taper pipe tap and core drill
全套管钻孔灌注桩
whole-pipe cast-in-situ pile
钻孔管内泵压混合料
mixture of boring tube pump pressure
定向钻扩孔
reaming operation in directional drilling