injector
  注射者,注射器,噴射給水器
  in·jec·tor /ɪnˈʤɛktɚ/ 名詞
  注射器
  injector
  注入極
  injector
  注入器
  In·ject·or n.
  1. One who, or that which, injects.
  2. Mach. A contrivance for forcing feed water into a steam boiler by the direct action of the steam upon the water. The water is driven into the boiler by the impulse of a jet of the steam which becomes condensed as soon as it strikes the stream of cold water it impels; -- also called Giffard's injector, from the inventor.
  fuel injector, a device for actively injecting fuel into an internal-combustion engines by directly forcing the liquid fuel into the combustion chamber at an appropriate point in the piston cycle; -- an alternative to a carburetor, in which an air-fuel mixture is drawn in by the downward stroke of the piston.
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  injector
       n : a contrivance for injecting (e.g., water into the boiler of
           a steam engine or particles into an accelerator etc.)