Kayayyakin hasken tirelar mu duk suna sanye da haɗin wayar tirela mai 4 fil, haka kuma mafi yawan fitilun tirela. Kuma da yawa motocin kamar tirela mai haske, tirelar jirgin ruwa, suna amfani da kayan aikin waya mai lamba 4 don haɗawa da abin hawa.Wannan haɗin yana samar da ainihin aikin kamar fitulu masu gudana, sigina, da birki...
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