"Launch vehicles." . . "Earth (Planet)" . . "Advanced launch vehicle upper stages using liquid propulsion and metalized propellants"@en . . . . . . . . . . . . . . . . . "Metal propellants." . . "Inertial upper stage." . . . . "Propellant additives." . . "Transfer orbits." . . "Space missions." . . "Earth orbits." . .