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No, it's a series hybrid. The fact that the hydraulic accumulator stores energy, instead of just transmitting it, is the difference between a hydrostatic transmission and a hydraulic hybrid. If you had a flywheel that could spin independently of the engine, you'd have a kinetic hybrid.
Anyway, it behaves like a hybrid: peak power greater than the engine's output allows the engine to be downsized. Kinetic energy is recovered during braking and used later. The engine runs only when required.
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