小麻花

两年前，当莉斯&一个满头的小麻花辫像瀑布一样垂在前额的年轻黑人妇女，在第一届诗歌节上朗读自己的诗时，她正怀着孩子。

Two years ago , when she read her texts at the first festival , Liz , a young Black woman with small braids cascading down her forehead , was pregnant .

前言：利用小直径麻花钻，改磨成“排孔钻”，并运用于技工学校的钳工专业技能培训。

Make use of small diameter twist drill to change it into drill of wearing intersect holes and put it into the ability education of locksmith .

小直径PCD麻花钻头电火花磨削加工系统的研制

Development of EDG System for Small Diameter PCD Twist Drills

基于数控电火花磨削加工机床，研制了用于加工小直径PCD麻花钻头的数控螺旋伺服进给加工系统，介绍了系统的加工原理、机械系统和伺服控制系统的设计方法。

Based on NC electrical discharge grinding ( EDG ) machine , the NC spiral servo feed system for machining small diameter PCD twist drills machining system is developed . The machining principle of this system , designs of the mechanism and the servo control system are introduced .

克服了用成型砂轮实现麻花钻的内锥面刃磨时，小直径尺寸的麻花钻无法磨削的缺点，同时又能提高麻花钻的刃磨效率和刃磨质量。

This device can overcome the limitations in sharpening small-diameter drills in the interior conical surface and hence improves the efficiency and quality in twist drill 's sharpening .