Counterbore (drill)
[化] 平底扩孔钻
🧩 词语组成解析
(用平底扩孔钻)扩孔［锪孔, 镗孔, 镗阶梯孔］, 沉孔, 埋头孔
🗣️ 情景例句
Thanks for your help.
谢谢你的帮助。
What month is next month?
下个月是几月份？
Would you like to try it?
您要试一试吗？