更多无人机交付在美国进行测试

2020-06-15 02:54:11

请求太多

https://www.roanoke.com/news/education/google-backed-drones-will-drop-library-books-so-kids-in-christiansburg-can-do-their-summer/article_d39a226c-edc1-5cd2-9af3-868ea26f5432.html