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Keywords: 9.2inchHowitzerMkITraversingGearDiagram.jpg Diagram of Traversing Gear of 9 2 inch Howitzer Mk I Model of 1917 US Army service Based on Diagram in Handbook of artillery including mobile anti-aircraft and trench matériel 1920 page 293 <br>http //www archive org/details/handbookofartill00unitrich 1920-05 United States Army Ordnance Dept US Government no copyright PD-USGov BL 9 2 inch Howitzer 1 1920s technical drawings |