This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
USArmy.inchTrenchMortarBombDiagramDecember. See also Model second delay action fuze March mm Trench Mortar Crosssectional view of inch mm Trench Mortar bomb as adopted by the US Army World War based on the original French manual Based on Plate and Page in Handbook of the Inch Trench Mortar Matriel US Ordnance Department