gun drill

• 深孔钻,枪孔钻,炮身钻床,单槽钻

gun drill的用法和样例：

例句

1. The topic of this graduation design drills a bed principal axis path to drill a tongs design toward the bore.
   本次毕业设计的课题是钻床主轴径向孔钻夹具设计。