Broken Clamps - High Frequency 5000 lb. Furnace - Building 421 Open PDF Document Details Document Type Technical Report Publication Date Dec 07, 1939 Accession Number ADA951418 Entities People H. G. Carter Tags DTIC Thesaurus Topics Availability Corrosion Embrittlement Frequency Frequency Bands Grain Size Hydrogen Embrittlement Identification Material Degradation Processes Photographic Materials Photographs Photography Radio Frequency Standards