What does HDEWG stand for?

Heavy-Duty Engine Working Group (US Environmental Protection Agency)

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Heavy Duty Engine Platform (automotive industry) Harvard Department of Earth and Planetary Science Homeland Defense Equipment Reuse Health Department Emergency Response Unit Heavy Duty Ejector Release Unit Head of Defence Export Services (UK) Highland Deaf Education Service (UK) Hospital do Divino Espírito Santo (Azores, Portugal) Human Dimensions of Environmental Systems (University of Illinois) High Desert Education Service District (Redmond, OR)		Haemodiafiltration Halogenated Dibenzofuran Halt Dich Fest (Germany) Halt Die Fresse (German) Hard Decision Feedback Hard Disk Failure Hard Drive File (computing) Hastings Diversified Utilities Fund (also seen as HDUF; Australia) Heavy Duty Fabric (product feature) Hereditary Disease Foundation