Northrop Grumman, m'modzi mwa zimphona zankhondo zaku US, adayesa bwino injini yamagetsi yamphamvu kwambiri ku US Navy, yoyamba padziko lonse lapansi ya 36.5-megawatt (49,000-hp) high-temperature superconductor (HTS) ship propulsion electric motor, kuwirikiza kawiri kuposa Mphamvu ya US Navy ...
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