purlin brace

例句：

1. 1. The engineer designed a new purlin brace for the bridge to improve its stability.
   工程师为桥梁设计了一种新的桁架梁以增强其稳定性。
2. 2.The construction of the bridge required the installation of purlin braces to support the weight.
   建造这座桥需要安装桁架梁来支撑重量。
3. 3. The purlin brace is crucial for the structural integrity of the bridge, ensuring that it can withstand heavy loads.
   桁架梁对于桥梁的结构完整性至关重要，它确保桥梁能够承受重载。