(n.) A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
COUNTERBORE
Meaning of COUNTERBORE in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
Webster's English dictionary. Английский словарь Webster. 2012