portable derrick crane

例句：

1. 1.The portable derrick crane is a versatile tool that can be used for various construction tasks.
   便携式起重机是一种多功能工具，可用于各种建筑任务。
2. 2.The portable derrick crane was essential in the construction of the new bridge, as it could easily move to different locations.
   便携式起重机在建造新桥的过程中起到了关键作用，因为它可以轻松地移动到不同的位置。
3. 3. The portable derrick crane was used to lift heavy materials and transport them to the construction site.
   便携式起重机被用来吊装重物并将其运输到施工现场。