"It puts thing into Humans."
Oh, Humans! Those vacuum sealed bags of flesh and blood! This innocuous device will allow you to put things into humans without having to break them apart.
Be it vaccines, antibiotics or a deadly injection, the versatility of the injector will allow you to use it in different stages of your factory: set in up with a conveyer belt right after a Cloning station to immunize your Humans, make it a part of your clinic set up or pop it up right at the beginning of your butchery line to... smooth the passage of your Humans and improve the taste of the meat.
Easy to set up, you can automate the input of substances by using a pipe.