stiffening piece

例句：

1. 1. This device is designed to stiffen the joints in your car.
   这个装置设计用来加固你的汽车的关节。
2. 2.The engineer used a stiffening piece to reinforce the beam.
   工程师使用一个加强件来加固梁。
3. 3. The new design of the building uses stiffening pieces to improve its strength and stability.
   新建筑的设计使用了加强件来提高其强度和稳定性。