https://www.trochoid.us/
Nippon Oil Pump Trochoid | Stafford Texas | Trochoid.us
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https://www.merriam-webster.com/dictionary/trochoid
TROCHOID Definition & Meaning - Merriam-Webster
The meaning of TROCHOID is the curve generated by a point on the radius of a circle or the radius extended as the circle rolls on a fixed straight line.
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