Ana amfani da sarƙaƙƙiya tare da safa na ja da sama don kawar da duk wani murɗa yayin shigar da kebul na fiber optic.Ana amfani da jujjuyawar sama a tsakanin riko na sama biyu don maye gurbin tsohon madugu da sabo ko tsakanin rikon ja da igiyar waya akan winch.Yana hana duk wani karkatar da madugu.
Jin kyauta don tambaya game da abin shackle.
karshen...
