counterbore
n.
沉孔;埋头孔（圆柱形）；平底扩孔（钻）；平头钻；平底锪钻
英英释义
noun

1
a bit for enlarging the upper part of a hole
Synonym:
countersinkcountersink bit
数据来源：WordNet

双语例句
1
Measurement Method and Experimental Research on Dynamic Force Behavior of Bottom Drill String counterbore with guide 

底部钻柱动态力学特性测量方法与实验研究有导柱的平底扩充孔钻

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2
The Design and Application of Mechanically Fixed Counterbore Drill 

机夹扩孔钻的设计与应用

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3
Counterbore with guide Pre-tensioned trough bearing pedestal of column stability analysis 

有导柱的平底扩充孔钻先张法槽式台座承力柱稳定问题浅析

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4
Active measuring instrument for section height of counterbore of angular contact ball bearings LOCK RED 

角接触球轴承锁球高主动测量仪

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5
Application of Drill-Counterbore Tool 

钻&锪复合刀具的应用

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6
The act of expanding an apertu