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From page 1...
... S U M M A R Y Transit agencies are driven by environmental and economic issues when selecting bus technology, and choices have grown substantially over the last 15 years. Most major U.S.
From page 2...
... 2oxidize the fuel completely, but with no excess of oxygen) that includes the fitting of three-way exhaust catalysts.
From page 3...
... cost choice for transit operation. Gasoline HEB usually cost 5% to 10% more than diesel HEB overall.

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