hypervelocity wind tunnel 9造句

AEDC "'Hypervelocity Wind Tunnel 9 "'is a hypersonic wind tunnel owned by the United States Air Force and operated by Aerospace Testing Alliance.
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.
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