injector

/in-jek-ter/US // ɪnˈdʒɛk tər //UK // (ɪnˈdʒɛktə) //

注射器,喷射器,喷油器,注入器

Definitions

n.名词 noun

1
- : a person or thing that injects.
- : Machinery. a device for injecting feedwater into a boiler against high pressure by means of a jet of steam.Also called fuel injector. a mechanism consisting of a pump, valves, and nozzles for spraying fuel into the cylinders of an internal-combustion engine.

A jet injector — that’s what they’re called — subjects a vaccine to different conditions than a sterile needle and syringe.
Set the injector as low as possible, as it works best with smallest possible lift.
Care should be taken that the injector is not so near the boiler as to become heated, else it will not work.
Starting an injector always requires some skill, and injectors differ.
Of course you must be sure that all joints are air-tight, else the injector will not work under any conditions.
Never use an injector where a pump can be used, as the injector is much more wasteful of steam.