HOME businessBoeing 737 Max 9: United Airlines finds loose bolts during inspections International Insights news portalbusiness 2024-04-30 08:17:320The investigation of a Boeing 737-9 MAX in Portland, Oregon after fuselage fell from the plane during an Alaska Airlines flight. Photo: NTSB / AFP上一篇Immersive Studio Ghibli exhibition opens in Shanghai下一篇Chemical and biological methods help restore ancient books in north China