1engineer
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Elaborate
Or
Link me :keyboard:
Here is a link to Tier IV progress. I am speaking of non highway diesel regulations but they are equivalent to the 2010 Tier II on highway regulations, except many companies have gotten waivers for their on highway equipment. Imagine that. Anyway here is a link to a magazine I get: Clean Diesel Emissions and Equipment Update: Tier 4 Standards, Update and Future Considerations - OEM Off-Highway