counter sunk head

短语词组

短语

• Counter -sunk head 埋头;静心
• counter sunk head rivet 埋头铆钉
• counter sunk head bolt 埋头螺栓
• counter sunk ovel head rievt 埋头凸顶铆钉
• counter sunk oval head rivet 埋头凸顶铆钉
• counter sunk flat head rivet 埋头平顶铆钉
• half -counter-sunk rivet head 半埋头式铆钉头
• round head counter sunk rivet 埋头圆顶铆钉
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