flat twist drill
英
美
- drill n.钻孔机；钻子；反复操练；播种机v.练习；钻孔；(军事)训练
- flat adj.平坦的；扁平的；单调的；断然的；[音乐]降音的；气不足的adv.平直地；直截了当；低于标准音高地n.公寓；平面部分；[音乐]降半音；泄气轮胎v.变平；降调；住公寓
- twist v.缠绕；捻；搓；拧；扭曲n.拧；捻；扭曲；盘旋；弯曲处
- The mathematical model of the hyperboloid twist drill was introduced.
介绍了以旋转单叶双曲面作麻花钻钻尖后刀面的数学模型。
- A twist drill is designed to drill a hole which has a particular size.
麻花钻用来钻削具有一定尺寸的孔。
