Kaczmarzyk P 1

1. Optimization of Vertical Ultrasonic Attenuator Parameters for Reducing Exhaust Gas Smoke of Compression–Ignition Engines: Efficient Selection of Emitter Power, Number, and Spacing
2. Ecological Paradox in the Reuse of Internal Combustion Engines from Scrapped Vehicles for Electric Power Generation—Circular Economy Potential Versus Emission Certification Barriers
3. The influence of kinematic viscosity of oils on the energy consumption of a gear pump used for pumping oil in machines and vehicles
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