countersink (drill)

• 尖底锪钻

countersink (drill)的英文翻译是什么意思，词典释义与在线翻译：

英英释义

名词 countersink:

1. a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface

2. a bit for enlarging the upper part of a hole

动词 countersink:

1. insert (a nail or screw below the surface, as into a countersink)