spherical chain

例句：

1. 1. The scientist used a spherical chain to measure the distance between two points on the surface of the planet.
   科学家使用一个球链来测量行星表面两点之间的距离。
2. 2. The engineer designed a spherical chain to connect the buildings together.
   工程师设计了一个球链来连接建筑物。
3. 3.The construction workers used a spherical chain to lift heavy objects onto the roof.
   建筑工人使用一个球链将重物提升到屋顶上。