countersink

1. A tool for making a countersink.
   做螺丝钉孔的工具。
2. The stress in the implants without countersink may distribut more evenly than that in those with countersink.
   无防沉装置的设计较有防沉装置者应力分布更均匀。
3. Milling, boring, drilling, countersink, reaming and tapering all these process can be made for just one fixture.
   零件一次装夹后可完成铣、镗、钻、扩、铰、攻丝等多工序加工。
4. Brace countersink insensitive to the needs of the patients.
   对病人的需要感觉迟钝。
5. Improvement and optimization of titanium alloys countersink drill
   钛合金锪钻改进与优化设计
6. Application of Floating Positioning Countersink Drill
   定位浮动式锪刀的应用
7. The prestressing degree is an important concept in P.P. The Effect of Countersink Depth On Seam Overlap Percent
   预应力度是P.P.压头埋头度对卷封叠接率的影响

noun

1. a bit for enlarging the upper part of a hole

   Synonym:    counterborecountersink bit

2. a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface

verb

1. insert (a nail or screw below the surface, as into a countersink)

   Synonym:    set