U fasten kuma ana kiranta U-dimbin kusoshi, mannen U, ko munduwa. Saboda kyakkyawan aiki da ƙarancin farashi, U bolt shine babban madaidaicin karfe a cikin masana'antar. Menene manufar U fasten? Lokacin da kuka rushe shi, U-fasten shine ƙulli a lanƙwasa zuwa siffar harafin "u...
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