telescopic jib crane

例句：

1. 1. The zoom lens on the camera is designed to be telescopically adjustable.
   相机上的变焦镜头设计为可以伸缩调节。
2. 2. The telescoping arm allows for easy access to hard-to-reach areas.
   伸缩臂便于进入难以到达的区域。
3. 3. The telescoping feature of this tool makes it ideal for use in tight spaces.
   该工具的伸缩功能使其非常适合在狭小空间中使用。