短語(yǔ)詞組短語(yǔ)Counter -sunk head 埋頭;靜心counter sunk head rivet 埋頭鉚釘counter sunk head bolt 埋頭螺栓counter sunk ovel head rievt 埋頭凸頂鉚釘counter sunk oval head rivet 埋頭凸頂鉚釘counter sunk flat head rivet 埋頭平頂鉚釘half -counter-sunk rivet head 半埋頭式鉚釘頭round head counter sunk rivet 埋頭圓頂鉚釘 返回 counter sunk head