| 释义 |
countersink /'kauntasujk; 'kauntsiijk/ vt (pt -sank /-saeijk; -/Saeijk/, pp -sunk /-SAijk; -zSAi)k/) 1 enlarge the top of (a hole) so that the head of a screw or bolt fits in level with or below the surface, 加大(孔洞)的顶端以便蝶丝钉或螺栓头旋入而与表面平齐或低于表面; 锁大(孔口)。 2 sink (the head of a screw or bolt) in such an enlarged hole. 将(螺丝钉或螺栓头)旋入此种加大之孔中。 |