English: Compact, using only gears, this transmission is an epicyclic gear with a crown that may change radius. Consequently, the transmission ratio may vary from any positive value to a negative one, passing through a ZERO position.
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to remix – to adapt the work
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attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
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