1.Manufactured daga babban simintin simintin gyare-gyare, damuwa da damuwa don matsakaicin tsayi da tsayin daka.Yana da mafi kyau don ci gaba da samarwa.
2.Tsukashi biyu da tsarin jagora guda ɗaya, wanda aka ƙera daga daji na jan karfe maimakon allon gargajiya don rage girman rikici.Aiki tare da tilas man shafawa don rage zafin zafin firam, haɓaka ingancin hatimi da tsawaita rayuwar injin.