Assertion: spacecraft's engine | /r/HasProperty | ssme
Facets:
Source sentences:
text: However, it was ultimately decided to modify proven space shuttle components—in particular, the space shuttle main engine (SSME), the solid rocket booster (SRB), and the external tank (ET)—in order to create new vehicles.
text: The Space Shuttle main engines (SSMEs) were ignited at T -6.6 seconds.