countersink
第三人称单数：countersinks
现在分词：countersinking
过去分词：countersunk
过去式：countersank
countersink
及物动词钻孔装埋，打埋头孔
名词埋头孔，暗钉眼
1. 锥口钻：将扩孔钻按照顺时针方向旋转一周后从孔中去除,若有需要,使用锥口钻(countersink)将孔口扩大. 植体植入上额骨时,可使用长柄(instrument handle)来代替牙科手机(handpiece). 利用与牙科手柄(Handle)相连的扩孔钻,可在口腔外去除牙骨与穿刺放液(tapping),
2. 埋头锥孔：841 、 埋头铆钉 countersink head rivet | 842 、 埋头锥孔 countersink | 843 、 埋头螺栓 countersink head bolt
3. 埋头孔：Counterclockwise 逆时针 | Countersink 埋头孔 | Course objectives 课程目的
4. 锥形锪钻：countershaft 中间轴 | countersink 锥形锪钻 | countersinking 锪锥孔
noun
1. a bit for enlarging the upper part of a hole
Synonym: counterbore countersink 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