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Swimming pool i.e. in-ground swimming pool, has rigid lateral walls inclined with respect to base element of pool on self-cleaning height from line located above water line to line located below water line
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Crankset with extendable cranks in movement and cycle equipped with such a crankset.
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Device for driving the front wheel of a motorised or non-motorised cycle, with a dog clutch for free wheel and a force-torque limiter
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Device making it possible to drive the front wheel of two- or three-wheeled land vehicles with or without an engine
