Fashewar Shenhai-Hujja
Ajalin “wayoyi hudu” yana nufin wayoyi masu rai guda uku da waya tsaka tsaki, an nada kamar A|B|C|N|, tare da N wakiltar waya ta ƙasa.
Ya kamata a haɗa wayoyi masu rai guda uku zuwa babban shigarwar babban maɓalli a cikin akwatin rarrabawar fashewa, kuma waya mai tsaka-tsaki yakamata a haɗa kai tsaye zuwa mashaya mai tsaka tsaki ba tare da fuse ba. Duk sauran maɓallai da na'urori yakamata a haɗa su daga ƙananan fitarwa na babban maɓalli.