countersink

英['kauntəsiŋk]美['kauntəsiŋk]

vt. 钻孔装埋,打埋头孔于
n. 皿锥,埋头孔,暗钉眼

同：	[n.] counterbore, countersink bit [v.] set

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
a bit for enlarging the upper part of a hole
[同] counterbore, countersink, countersink bit

insert (a nail or screw below the surface, as into a countersink)
[同] countersink, set

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