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In the military (in the 1960s) they have front echelon and rear echelon maintenance.
Front echelon motor pools address daily wear and tear, then every [maintenance period] they are taken to rear echelon where they get a frame up restoration.School buses aren't discrete vehicles, they are embedded in a pupil delivery system.
New vehicles can be cycled into the fleet but they won't be replaced en mass.
In other news, Tesla holds a patent for using 4 ganged aluminum injection molding machines that can together mold a complete car monocoque body in one piece. With this, they could make a modular bus body — the short bus just the front and back ends, with sections that can be added in the center.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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