1. Exhaust gas recirculation (EGR);

2. (d) Exhaust Gas Recirculation (EGR) system;

3. Exhaust gas recirculation (EGR) (with or without)

4. The most common available emission abatement technologies that would ensure compliance with the Tier III requirements are exhaust gas recirculation (EGR) systems, selective catalytic reduction (SCR) systems, or engines (partly) fuelled by liquified natural gas (LNG).