| 釋義 |
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)的頂端以便蝶絲釘或螺栓頭旋入而與表面平齊或低于表面; 鎖大(孔口)。 2 sink (the head of a screw or bolt) in such an enlarged hole. 將(螺絲釘或螺栓頭)旋入此種加大之孔中。 |