The hot air balloon is the first successful human-carrying flight technology. The first untethered manned hot air balloon flight was performed by Jean-François Pilâtre de […] Xem thêm
Tổng đài tư vấn luật, Dịch vụ tư vấn pháp luật
The hot air balloon is the first successful human-carrying flight technology. The first untethered manned hot air balloon flight was performed by Jean-François Pilâtre de […] Xem thêm