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Overall view of the fuel (RP-1) turbopump. This side of the engine is very close to the wall, limiting photography.

LOX entered the turbopump at center (the inducer impeller raised the pressure of the RP-1 for the main impeller, located inside the turbopump) and exited at the turbopump discharge at lower left into the fuel duct.

Note the ID plate on the face of the turbopump, partially obscured by the silver metal plate with the four holes.

See my page on the Rocketdyne Mark 3 turbopump.