displaying 1 - 1 results in total 1
Armstrong, F. E.
view article (1.0)Method and Apparatus for Measuring Incombustible Content of Coal Mine Dust Using Gamma-Ray Backscatter. Patent Application.['PAT-APPL-550099', 'Serial 550,099']PAT-APPL-550099; Serial 550,099
February 14, 1975
22 p.