Anh
backward wave
Đức
Rückwärtswelle
Pháp
onde rétrograde
onde inverse
onde rétrograde /ENG-ELECTRICAL/
[DE] Rückwärtswelle
[EN] backward wave
[FR] onde rétrograde
onde inverse,onde rétrograde /ENG-ELECTRICAL/
[FR] onde inverse; onde rétrograde