countersink是什么意思

网络释义

1)countersink,锥形锪钻2)machine countersink,机用锥形锪钻3)Countersink,锥面锪钻4)counter sinks with parallel shanks,直柄锥面锪钻5)countersink drill,锪钻6)countersinking,锪锥孔

Improvement and optimization of titanium alloys countersink drill;

钛合金锪钻改进与优化设计