From Ohio History Central
Aluminum casting. The heads of these heat-treated pistons must be spotted prior to Brinnell hardness testing. Young women are employed for this job by a large Midwest aluminum foundry now converted to war production. Aluminum Industries Inc., Cincinnati, Ohio
Library of Congress LC-USE6-D-003041
(Reusing this file)
Click on a date/time to view the file as it appeared at that time.
|current||19:02, 24 April 2013||316 × 400 (18 KB)||Maintenance script||Importing image file|
- You cannot overwrite this file.
- Edit this file using an external application (See the setup instructions for more information)