埋头：一种用于将螺钉或螺栓埋入材料表面的加工方法，使其与表面平齐或略低于表面。
沉孔
埋头钻，锥口钻
打埋头孔钻孔的
... counter sunk screw pin shackle 平头螺栓卸扣 counter sunk 钻孔的 counter switch 计时开关计数开关 ...
... 桥工铆钉孔铰刀 bridge reamer 钉孔 counter sunk 打钉孔 tack holes ...
钻孔
All holes in the base of the chassis have been counter sunk to protect the screws from damage when going over kerbs or when the car bottoms out over bumps.
所有漏洞，该基地的底盘已沉入柜，以保障螺丝损坏时，尽量多利用路肩或当汽车从谷底超过颠簸。