corner fittings

例句：

1. 1.The carpenter used corner fittings to reinforce the wooden beams.
   木匠使用角落配件加固木梁。
2. 2. The construction company provided corner fittings for the new building.
   建筑公司为新建筑提供了角落配件。
3. 3.The engineer tested the corner fittings before installing them in the building.
   工程师在安装这些角落配件之前进行了测试。