steel beam for crane

例句：

1. 1. The steel beam for the craneis being installed in the factory.
   起重机的钢梁正在工厂安装。
2. 2. Theengineers carefully checked thesteel beam for strength and durability.
   工程师们仔细检查了钢梁的强度和耐用性。
3. 3. Thesteel beam was a criticalcomponent of the bridge construction project.
   钢梁是桥梁建设项目的关键组成部分。