noun🔗Share沉头孔，埋头孔 A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface."The mechanic used a counterbore to create a recess in the metal plate, allowing the screw to sit flush with the surface. "这位机械师用沉头钻在金属板上加工了一个凹槽，这样螺丝就能与表面齐平了。technicalmachinepartindustryChat with AIVocabulary GamePractice Reading
noun🔗Share沉孔刀，扩孔钻。 The tool with which a counterbore is machined."The machinist selected the correct counterbore to enlarge the hole and recess the screw head. "那个机械师选择了合适的沉孔刀来扩大孔洞并为螺钉头制造凹槽。technicalmachineutensilworkindustryChat with AIVocabulary GamePractice Reading
verb🔗Share锪孔， 沉孔. To create such a cylindrical recess."The carpenter will counterbore the hole so the screw head sits flush with the surface of the wood. "木匠会锪孔，这样螺丝头就能与木头表面齐平。technicalmachineworkbuildingChat with AIVocabulary GamePractice Reading
