en rocket stage (n)
― IsA ⟶
Weight: 1.0
en single stage rocket (n) Source: OpenCyc 2012
en rocket booster (n)
― IsA ⟶
Weight: 1.0
en rocket stage (n) Source: OpenCyc 2012
en rocket stage (n)
― IsA ⟶
Weight: 1.0
en tangible thing (n) Source: OpenCyc 2012