countersunk head semi-tubular rivet

例句：

1. 1. The construction of the bridge required theinstallation of countersunk head semi-tubular rivets.
   建造这座桥需要安装倒锥形头部半管状铆钉。
2. 2. The engineer carefully measuredand fitted the countersunk head semi-tubular rivets toensure a secure connection.
   工程师仔细测量并安装倒锥形头部半管状铆钉，以确保连接牢固。
3. 3. The structuralintegrity of the building was maintained by usinghigh-quality countersunk head semi-tubular rivets.
   通过使用高质量的倒锥形头部半管状铆钉，保持了建筑的结构完整性。