broached rifling多点式拉削法
Broached Commissions启思会
broached cop锥形纱管
broached groove拉槽
broached groove tools拉槽刀
broached groove tool head拉槽工具头
V-T（及物动词） When you broach a subject, especially a sensitive one, you mention it in order to start a discussion on it. 提出
Eventually I broached the subject of her early life.
最后我提出她早年生活的话题。
V（动词） to cause (a sailing vessel) to swerve sharply and dangerously or (of a sailing vessel) to swerve sharply and dangerously in a following sea, so as to be broadside to the waves 使(帆船)突然剧烈转向 [nautical]
N（名词） a long tapered toothed cutting tool for enlarging holes 扩孔机