countersink

vt. 鑽孔裝埋、打埋頭孔於

n. 埋頭孔、錐口鑽

學術名詞

• 埋頭孔：機械工程、電機工程、電力工程
• 加工埋頭孔：電機工程、電力工程、機械工程
• 錐坑：工程圖學、機械工程

英文釋義

1. a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface
2. a bit for enlarging the upper part of a hole
3. insert (a nail or screw below the surface, as into a countersink)