پرونده:Cylinder engine (PSF).pngDescriptionCylinder engine (PSF).png line art example of a cylinder. Source Archives of Pearson Scott Foresman, donated to the Wikimedia Foundation Author
پرونده:Steam Engine (PSF).pngDescriptionSteam Engine (PSF).png English: an engine driven or worked by steam Date 24 January 2020 Source Archives of Pearson Scott Foresman, donated
پرونده:Piston (PSF).pngDescriptionPiston (PSF).png English: Line art drawing of a piston. Piston Cylinder Source Archives of Pearson Scott Foresman, donated to the Wikimedia
پرونده:Spark Plug (PSF).pngDescriptionSpark Plug (PSF).png English: a part that fits into the cylinder head of an internal combustion engine and carries two electrodes separated