词汇	racial formation
释义	racial formation 种族形构
随便看	commutator electromotor commutator end commutator end bearing commutator end bracket commutator end felt wick commutator end felt wick cover commutator end frame commutator end head commutator end head cover commutator end plate cover gasket commutator face commutator fastening commutator for emergency manoeuvres commutator frequency changer commutator frequency converter commutator generator commutator grinder commutator grinding commutator group commutator-group isomorphism commutator head commutator hood commutator hub commutatorial commutator ideal