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The outcomes indicate that the present SCR technology may have specific dangers in exceeding the long term Asia VI NH3 restriction. However, five China IV/V HDDVs were discovered having SCR heat sensors that were intentionally tampered with, causing comparable and on occasion even higher NOX emissions and zero NH3 emissions. Increased NO2 emissions because of the use of diesel oxidation catalysts and diesel particulate filters were also found from our experiments. This study h