例句與造句

1. AEDC "'Hypervelocity Wind Tunnel 9 "'is a hypersonic wind tunnel owned by the United States Air Force and operated by Aerospace Testing Alliance.
2. The U . S . Air Force's Arnold Engineering Development Center ( AEDC ) currently ( in 2010 ) operates the Hypervelocity Wind Tunnel 9 . This facility, known simply as " Tunnel 9, " operates by blowing down hot, high-pressure nitrogen gas through one of several available axially-symmetric 12-meter-long De Laval nozzles, through a test section, and into a downstream vacuum sphere.
3. It's difficult to find hypervelocity wind tunnel 9 in a sentence. 用hypervelocity wind tunnel 9造句挺難的