沉头钻的英文

• countersunk drilling

• 沉:    sink
• 头:    5点就得动身 have to start before ...
• 钻:    drill; auger
• 沉头:    grooved pins-with round head or countersunk head
• 匙头钻:    spoon bit

例句与用法

1. Detachable pilots for counterbores and countersinks
   扩孔钻和沉头钻用可拆卸导杆
2. Counterbores with morse taper shank and detachable pilot
   莫氏锥柄和可拆卸导杆沉头钻
3. 90 countersinks with parallel shank and solid pilot
   直柄固定导杆的90沉头钻
4. Countersinks , 90 degrees , with parallel shanks and solid pilots
   直柄实心导杆90沉头钻
5. 90 countersinks with morse taper shank and detachable pilot
   莫氏锥柄可拆卸导杆90沉头钻