37640 - Space propulsion units & Parts (Miscellaneous)
37645 - Complete missile or Space vehicle engines and/or Propulsion units
3764511 - - Complete missile or Space vehicle engines and/or Propulsion units: Military customers
3764513 - - Complete missile or Space vehicle engines and/or Propulsion units: Nonmilitary customers
3764515 - - Complete missile or Space vehicle engines and/or Propulsion units: other Customers
3764599 - - Missile or Space vehicle engines and/or Propulsion units, Complete (Miscellaneous)
37646 - Research & Development on complete missile or Space vehicle engines and/or Propulsion units
3764611 - - Research & Development on missile or Space vehicle engines or Propulsion units: Military customers
3764613 - - Research & Development on missile or Space vehicle engines or Propulsion units: Nonmilitary customers
3764615 - - Research & Development on missile or Space vehicle engines or Propulsion units: other Customers
3764699 - - Research & Development on missile or Space vehicle engines or Propulsion units (Miscellaneous)
37647 - Services on complete missile or Space vehicle engines and/or Propulsion units (General)
3764711 - - Services on missile or Space vehicle engines or Propulsion units: Military customers
3764713 - - Services on missile or Space vehicle engines or Propulsion units: Nonmilitary customers
3764715 - - Services on missile or Space vehicle engines or Propulsion units: other Customers
3764799 - - Services on complete missile or Space vehicle engines and/or Propulsion units (Miscellaneous)
37648 - Missile & Space vehicle engine and/or Propulsion unit parts & Accessories
3764811 - - Missile & Space vehicle engine or Propulsion unit parts & Accessories: Military customers
3764813 - - Missile & Space vehicle engine or Propulsion unit parts & Accessories: Nonmilitary customers
3764815 - - Missile & Space vehicle engine or Propulsion unit parts & Accessories: other Customers
3764899 - - Missile & Space vehicle engine and/or Propulsion unit parts & Accessories (Miscellaneous)
3764XX0 - - Space propulsion units & Parts (Miscellaneous - Volume)
3764XX2 - - Space propulsion units & Parts (Miscellaneous - Speciality)