Pressure-Controlling Valve Mechanism For Hydraulic Presses. Page: 1 of 4
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Pressure-Controlling Valve Mechanism For Hydraulic Presses., patent, November 8, 1898; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth510538/m1/1/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.