gear - Simple English Wiktionary

spline - Wiktionary, the free dictionary

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Planetary gear Meaning

Gear Types and Terminology

What is the difference between Fifth Gear and Top Gear? - Quora

File:Epicyclic gear ratios.png - Wikipedia

Simple English Wiktionary - Wikidata

I found Joyboy in old chinese scriptures' but I put effort into the post so it does not get deleted on rule 5. : r/OnePiece

Gear - Wikipedia

User blog:Mark Otaris/The story of a sockpuppet, Roblox Wiki

Wolfgang Hilbig