US aircraft maker Boeing has just revealed its new 2022 ecoDemonstrator plane -- a converted, 20-year-old 777-200ER that will be tasked with testing new technologies aimed at making air travel more sustainable and safer.
원문출처 : https://www.cnn.com/travel/article/boeing-777-ecodemonstrator/index.html
원문출처 : https://www.cnn.com/travel/article/boeing-777-ecodemonstrator/index.html