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1. Power performance index: how much power is emitted and how much power / torque reserve is. 2. Economic performance index: fuel consumption per unit power per unit time. 3. Reliability and durability index: the longest running time between overhaul or replacement of parts and long-term working ability without failure. 4. Environmental performance indicators (NOx, HC, Co, particulate, noise): harmful emissions per unit power per unit time.
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