Jìshù rényuán zhèngzài jiǎnxiū zhè tái fādòngjī.
Technicians are overhauling this engine.
Dìtiě jīnwǎn tíng yùn, jìnxíng dìngqī jiǎnxiū.
The subway is suspended tonight for routine maintenance.
Dìngqī jiǎnxiū kěyǐ yáncháng shèbèi de shǐyòng shòumìng.
Regular overhauls can extend the service life of equipment.
