2938374 - 31 May 1960 - E L Criscuolo, D Polansky & D P Case - Protection Of Combination Locks Against Entry By Radiography.
Attachment 5791 Attachment 5792 Attachment 5793 Attachment 5794
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2938374 - 31 May 1960 - E L Criscuolo, D Polansky & D P Case - Protection Of Combination Locks Against Entry By Radiography.
Attachment 5791 Attachment 5792 Attachment 5793 Attachment 5794