large-size drill 大型钻头

tap-size drill 螺孔钻

tap size drill 螺孔钻头

Drill size 钻孔尺寸 ; 钻孔大小 ; 钻头尺寸

Size Of Drill Shank 钎尾尺寸

drill size conversion chart 钻头尺寸换算表

Tapping Drill Size 攻丝钻孔尺寸

nominal size of drill collar [油气] 钻铤公称尺寸

tap-drill size 螺孔钻直径

drill-rod size 钻杆尺寸