v.張捫孔口；鉆孔裝埋；打埋頭孔

n.皿錐；埋頭孔；暗釘眼

A tool for making a countersink. 做螺絲釘孔的工具

To drive(a screw or bolt) into a countersink. 將鉆或螺栓置入埋頭孔

Orthopaedic instruments.Drills, taps and countersink cutters for use with osteosynthese screws with asymmetrical thread and spherical under-surfaces. 外科醫(yī)療器械.

Keywords countersink diameter;peg;grip; 鉆孔直徑;銷釘;握著力;

drill and countersink combination 尖角鈍角兩用鉆