Lub teeb Bus engine yog siv nyob rau hauv ntau yam tsheb npav, xws li:
1. Cov tsheb npav hauv nroog: Cov tsheb npav no yog siv rau kev thauj mus los rau pej xeem hauv nroog.
2. Cov tsheb npav hauv tsev kawm ntawv: Cov tsheb npav no yog siv los thauj cov menyuam kawm ntawv mus thiab los ntawm tsev kawm ntawv.
3. Cov tsheb npav caij tsheb npav: Cov tsheb npav no yog siv rau kev mus ncig ntev, xws li kev mus ncig ua si lossis ncig ncig.
4. Cov tsheb thauj mus los: Cov tsheb npav no yog siv los thauj cov neeg caij tsheb ntawm qhov chaw, xws li tshav dav hlau lossis tsev so.
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