隙孔 meaning in English

clearance hole
lyriform pore

Terminal clearomee hole
端接全隙孔
Subland twist drills with morse taper shank for clearance holes and countersinks for countersunk head screws
留隙孔用锥柄多刃阶梯麻花钻和沉头螺钉用沉头钻
Subland twist drills with parallel shank for clearance holes and counterbores for hexagon socket head cap screws and slotted cheese head screws
留隙孔用直柄多刃阶梯麻花钻和内六角头圆头螺钉和一
Subland twist drills with morse taper shank for clearance holes and counterbores for hexagon socket head cap screws and slotted cheese head screws
留隙孔用直柄多刃阶梯麻花钻和内六角头圆头螺钉和一