countersink是什么意思_countersink怎么读_音标'kaʊntəˌsɪŋk

countersink是什么意思音标:英 ['kaʊntəˌsɪŋk]美 ['kaʊntəˌsɪŋk]

vt. 钻孔装埋, 打埋头孔于
n. 埋头孔, 锥口钻

n. a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and pe below the surface