Steam Seal Stuffing Box Low Pressure Valve Stems
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Steam Seal Stuffing Box Low Pressure Valve Stems, technical drawing, June 18, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1188005/: accessed June 12, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting Texas Parks & Wildlife Department.