Assertion: liquefied hydrogen | /r/ObjectUse | used as propellant
Facets:
value: primarily
type: DEGREE
value: for nuclear-powered rockets
type: PURPOSE
value: for space vehicles
type: PURPOSE
Source sentences:
text: Liquefied hydrogen has been used primarily as a rocket fuel for combustion with oxygen or fluorine, and as a propellant for nuclear-powered rockets and space vehicles.