self-service
adjective uk/ˌselfˈsɜː.vɪs/ us/ˌselfˈsɝː.vɪs/
B1 （尤指商店或饭店）自选的，自助的
especially in a shop or restaurant, not being served by an employee but collecting goods or food yourself
a self-service salad bar 自助色拉吧
self-service petrol pumps 自助加油机
Compare: full-service