Levai's Epicyclic Planetaries "H" Type

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Epicyclic trains are categorized into 12 types by Z. Lévai, labeled "A" to "L". Among these, type "H" is considered simple as planet gears interact only with sun and ring (in this case, two rings). The diagrams depict equations for each mechanism. Notably, the Simplified Equation remains consistent across all 12 designs. Additionally, an index showcases all 12 types: "A" to "L".