Utsogoleri Senken imapereka zinthu zapamwamba kwambiri kuti zithandizire pakuwunikira kwadzidzidzi komanso zochenjeza Za Senken Utsogoleri Mbiri Chikhalidwe Chitsimikizo cha System Titsatireni Chitsimikizo cha System Chitsimikizo cha Zamalonda Chitsimikizo cha Patent Ziyeneretso za Ulemu ku_5 ku_3 ku_4 ku_2 ulemu gawo_1