Broken Clamps - High Frequency 5000 lb. Furnace - Bldg. 421 Open PDF Document Details Document Type Technical Report Publication Date Dec 07, 1939 Accession Number ADA951459 Entities People H. G. Carter Tags DTIC Thesaurus Topics Availability Corrosion Frequency Frequency Bands Grain Size Identification Inventory Photographic Materials Photographs Photography Radio Frequency Standards