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Diesel Exhaust Fluid (DEF), commonly known by the brand name AdBlue, is a high-purity urea solution used to reduce harmful emissions from diesel engines. With stricter global regulations on nitrogen oxide (NOx) emissions, DEF has become an essential component in modern diesel vehicles and industrial machinery. It plays a critical role in supporting environmental sustainability while ensuring compliance with emission standards such as Euro 6 in Europe and EPA regulations in the United States.
In some cultural discussions, it is seen as a personal lifestyle choice or a technological solution to specific social problems. This gradually more tolerant public opinion reduces the psychological burden on users, allowing them to more openly consider full size sex dolls as true companions.
