View of the oxidizer feedline.
Picture 1 of 2.
Note the two cut away areas: At left, where the engine's feedline connects to
the Service Module's line, is a vaguely conical screen; I assume this serves to
filter any particulate matter which may have contaminated the oxidizer supply.
Just right of center is the feedline's bellows which allows the feedline to flex as
the engine gimbals.
The oxidizer line, afer partially wrapping around the engine horizontally, runs vertically to the valves at the forward end of the engine.