A420 WLL6 Concentric kuderedza rudzi rwekudzora, iyo iri muchimiro checompencric cone chimiro. Iyo ine magumo maviri, mumwe mugumo ane dhivha yakakura uye imwe yekupedzisira ine dhivha diki, uye pakati pedendeji yeiyo huru uye madiki emigumo ndeyekuenderana, ndiko kuti, ndiko kuti, ndiko kuti, ndiko, ndiko.