| 释义 |
two-phase four-wire system two-phase four-wire system[′tü ¦fāz ′fȯr ¦wīr ′sis·təm] (electricity) System of alternating-current supply comprising two pairs of conductors, between one pair of which is maintained an alternating difference of potential displaced in phase by one-quarter of a period from an alternating difference of potential of the same frequency maintained between the other pair. |