If rocket engines only need fuel and oxidizer, then why there are so many pipe lines on the engines? - Space Exploration Stack Exchange
When you see a car has 2 exhaust pipes, does it mean that it has 2 engines? - Quora
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The Pipes And Mechanical Systems Of An Aircraft Jet Engine. Would Make A Great Steam Punk Background. Stock Photo, Picture and Royalty Free Image. Image 12531699.
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The Pipes And Mechanical Systems Of An Aircraft Jet Engine. Would Make A Great Steam Punk Background. Stock Photo, Picture and Royalty Free Image. Image 12531655.