Detailed mock-up information; Iris diaphragm.

Bibliographic Details
Corporate Author:	United States. Army Air Forces
Format:	Government Document eBook
Language:	English
Published:	[Washington] : [s.n.], 1945.
Subjects:	Aeronautics > Study and teaching. Optical instruments.
Online Access:	Electronic resource (PDF)

Description
Item Description:	Illustrate the appearance and operation of the iris diaphragm. Includes photos and construction diagram.
Physical Description:	1 online resource (11 pages .), digital, PDF file