expansion brace

例句：

1. 1. The engineer usedan expansion brace to support the heavyload.
   工程师使用膨胀螺栓来支撑沉重的负荷。
2. 2. The construction crew had to use aspecial expansion brace for the new bridge.
   建筑工人不得不使用一种特殊的膨胀螺栓来建造新桥。
3. 3. The carpenter installedthe expansion brace before starting the project.
   木匠在开始这个项目之前安装了膨胀螺栓。