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  1. pdfNational Library of Medicine - Programs and Services, Fiscal Year FY05 
    https://www.nlm.nih.gov/ocpl/anreports/fy2005.pdf
    ... actions before water will be released onto the fire: first, the smoke detection system must identify a developing fire and then open the pre-action valve; second, ...
  2. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... Policy N06.230.208 Explosions N06.230.216 Fires N06.230.216.500 Fire Extinguishing Systems N06.230.216.750 Spontaneous Combustion ... Pollution, Radioactive N06.850.460.100.555 Tobacco Smoke Pollution N06.850.460.150 Biofouling N06.850. ...