wéi / xiū / gōng / gěi / mén / huàn / le / yí / ge / xīn / de / bēng / gōng / zi / mén / jiù / néng / zì / dòng / guān / shàng / le维修工给门换了一个新的绷弓子,门就能自动关上了。The repair worker replaced the door's return spring, and now the door closes automatically.