[rottndog]

Rocket engines don’t have moving parts, and no turbine blades.

[Wayne07]

"The F/A-18 Super Hornet has approximately 150 parts in the forward fuselage area that have been produced through selective laser sintering,” stated Boeing spokesman Nathan

3D printing technology is moving fast, particularly in the materials.

[FreedomPoster]

You are apparently unfamiliar with the high-speed turbine pumps necessary for operation of a liquid-fueled rocket engine. You have to get the fuel and oxidizer into the combustion chamber somehow.

[Ozark Tom]

Turbopumps!

[r_barton]

Rocket engines have turbine blades that turn at thousands or rpm. Much faster than any jet engine and at more extreme temperatures and higher psi.