TRUCK & OFF-HIGHWAY ENGINEERING ® Hydrogen combustion JCB debuts clean-sheet H2 engine at CONEXPO Caterpillar doubles down on diesel Deere massproduces 3D-printed metal part Medium-duty electric trucks multiplying April 2023 mobilityengineeringtech.comhttps://www.mobilityengineeringtech.com https://www.sae.org/ https://www.mobilityengineeringtech.com/