短語(yǔ)詞組短語(yǔ)countersink heoffer bolt 埋頭螺栓countersink hearticle bolt 埋頭螺栓countersink head bolt 埋頭螺栓;靜心螺栓;埋頭Flat countersink squar neck bolt 沉頭方頸螺栓 返回 countersink bolt