What is the meaning of pinion and crown wheel?

noun

WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). pinion and crown wheel. Retrieved September 27, 2026, from http://smartdefine.org/pinion_and_crown_wheel/definitions/1302205
ChicagoWordNet. 2010. "pinion and crown wheel" http://smartdefine.org/pinion_and_crown_wheel/definitions/1302205 (accessed September 27, 2026).
HarvardWordNet 2010, pinion and crown wheel, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/pinion_and_crown_wheel/definitions/1302205>.
MLAWordNet. "pinion and crown wheel" 23 October 2010. Web. 27 September 2026. <http://smartdefine.org/pinion_and_crown_wheel/definitions/1302205>