SM50T-3 igwe-egwe ọka okporo ụzọ maka obodo mepere emepe manhole mkpuchi egwe ọka ọrụ

A na-eji igwe igwe igwe SM50T-3 mee ihe maka ọrụ igwe mkpuchi mkpuchi okporo ụzọ maka okporo ụzọ obodo mepere emepe yana ndị ọkachamara na-ahụ maka ya ghọtara mkpagharị ya na arụmọrụ ya nke ukwuu.