Can you give the precise name of this rocket component is, and its role?
#ArianeGrouppic.twitter.com/UsPr0HLdPS
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Can you give the precise name of this rocket component is, and its role?
#ArianeGrouppic.twitter.com/UsPr0HLdPS
Hum... Most difficult.
What part ? Part of a motor, on the top of main combustion chamber.
What motor ? Very hard... Vulcain ? 
The hint is how it seems to have been produced. That's the best clue you can use to differentiate them. 
Additive manufacturing ? Indeed, it seems to be monolithic, not an assembly of some parts...
Prometheus ?
We're using additive manufacturing for other products as well, not only Prometheus. (Although Prometheus almost gets the 100% treatment)
I don't know which engine uses additive manufacturing injection plates

Let's wait tomorrow and check the answer together
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