Which country has built the world's most powerful hypersonic wind tunnel?
Which country has built the world's most powerful hypersonic wind tunnel?
دنیا کی سب سے طاقتور ہائپرسونک ونڈ ٹنل کس ملک نے بنائی ہے؟
Explanation
In 2023, China has built the world's most powerful hypersonic wind tunnel.
The tunnel called JF-22, has a diameter of 4 meters (13 fit)