Aerospace and Propulsion
b. Components and structures, specially designed for launch vehicle propulsion systems specified in 9.A.5. to 9.A.9. manufactured using any of the following: 1. "Fibrous or filamentary materials" specified in 1.C.10.e. and resins specified in 1.C.8. or 1.C.9.b.; 2. Metal "matrix" "composite" materials reinforced by any of the following: