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B-unit
01
a non-powered locomotive unit that is coupled with a powered locomotive to provide additional traction or increase hauling capacity on trains
Example
Engineers designed the B-unit with streamlined features to minimize air resistance and improve fuel efficiency.
Mechanics inspected the B-unit regularly to ensure it maintained optimal performance and safety standards.
The B-unit was coupled behind the lead locomotive to help pull the heavy freight train up the steep incline.
