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The lack of a particle count criterion for certain engine categories or between the power ranges within the engine categories is to be rejected. This can open the way to avoidance strategies in certain engine categories (such as NRG above 560 kW). With respect to emissions production and the long period of use of certain engine categories (up to 60 years in locomotives!), an obligation to use a particle filter should be used precisely here. If this leads to adaptation problems in some branches of industry (including inland waterways and train companies), this must be accompanied by subsidies for reasons of political economics. From a workers' perspective, diesel engines under 19 kW should also be included as in California2 there has been a requirement for a long time for a particle filter for machinery larger than 9 kW (such as generators, trailer refrigeration units/TRUs and small auxiliary engines/APUs), which can also be complied with by companies that offers the same products both in the Internal market and in California, although in Europe they exhibit poorer emission values.
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