an enlargement at the outer end of a drilled hole, either funnel-shaped (a countersink) or cylindrical (a counterbore)
trad. 鍃孔
Also written 鍃孔【huō kǒng】
an enlargement at the outer end of a drilled hole, either funnel-shaped (a countersink) or cylindrical (a counterbore)
trad. 鍃孔
Also written 鍃孔【huō kǒng】