详细解释:vt. 钻孔装埋, 打埋头孔于
n. 埋头孔, 锥口钻
【机】 锥坑
词型变化：
动词过去式:countersunk过去分词:countersunk现在分词:countersinking第三人称单数:countersinks英语解释：
名词 countersink:
a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surfacea bit for enlarging the upper part of a hole同义词：counterbore, countersink bit