Ratverhouding: Verskil tussen weergawes
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Lyn 18:
:<math>gr = \frac{d}{D} = \frac{2r}{2R} = \frac{r}{R}</math>
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[[Kategorie:Ingenieurswese]]
[[Kategorie:Meganiese toestelle]]
[[bg:Предавателно отношение]]
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