“凸边”的英语？

“凸边”的拼音为：tū biān...

凸边铆钉. 与其他铆钉端点结合使用.Collar head rivet. Use in conjunction with other rivet ends.逆时针 旋开调节钮使外面带有凸边的环松动.Release the outer knurled ring by rotating the clamping screw anti - clockwise ....