他还发明了高空吊运车，这是一种为飞机和大型的氦气球的空中救援系统。

He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.

youdao

他还发明了高空吊运车，这是一种为飞机和大型的氦气球的空中救援系统。

He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.

youdao