guard rail clamp

例句：

1. 1. The guard rail clamp was used to secure the fence posts.
   护栏夹具被用来固定篱笆桩。
2. 2. The guard rail clamp prevented the train from colliding with the car.
   护栏夹具防止了火车与汽车相撞。
3. 3. The guard rail clamp was designed to prevent people from falling off the bridge.
   护栏夹具的设计是为了防止人们从桥上掉下去。