counterbore 详细解释

counterbore

[kauntə'bɔ:]

vt. 扩孔(平头钻, 埋头孔)
n. 用平底扩孔钻扩孔

英英释义

名词 counterbore:

a bit for enlarging the upper part of a hole

同义词:countersink, countersink bit

补充

counterborecounterbore[kauntəˈbɔ:]n.1.(用平底扩孔钻)扩孔[锪孔,镗孔,镗阶梯孔];沉孔,埋头孔