injector
/ɪnˈdʒektə(r)/noun
1- a person or thing that injects something注射者; 注射器, 注入器。
1.1
- （亦作fuel injector）(in an internal-combustion engine) the nozzle and valve through which fuel is sprayed into a combustion chamber（内燃机）燃油喷嘴。
1.2
- (in a steam engine) a system of nozzles that uses steam to inject water into a pressurized boiler（蒸汽机）蒸汽注水器。