Public domain
Rather than wait two months for the delivery of a machine which would burr holes on the inside of a shell booster, the engineering department of a Midwestern plant built its own machine in thirty hours. A novel feature of the homemade machine is the use of a dental burr, which in peacetime is used t
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Credit lineRather than wait two months for the delivery of a machine which would burr holes on the inside of a shell booster, the engineering department of a Midwestern plant built its own machine in thirty hour. 1942-01-01. United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.