vt.鉆孔

adj.埋頭的

Hexalobular socket countersunk head tapping screws. 沉頭內(nèi)六角攻絲螺釘。

CROSS RECESSED COUNTERSUNK HEAD WOOD SCREWS B.S. 英制十字槽沉頭木螺釘。

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

Countersunk, Checkered Head, Diamond Point, Polished. 沉頭，花格帽，鉆石尖，拋光處理。

A common usage is to allow the head of a countersunk bolt or screw, ... 馬車螺栓（螺栓教練）：有一個(gè)圓頂或沉頭，而小腿是由簡短根據(jù)頭方節(jié)突破。