1. Rarraba kura kau kwarangwal Cylindrical, m, lu'u-lu'u, ambulaf, lebur, ambulaf, trapezoid, star, spring.Na biyu, samar da kwarangwal na kawar da ƙura An kafa kejin jakar, wanda kuma aka sani da kwarangwal, ta hanyar walda na lokaci ɗaya tare da kayan aiki na musamman.Ingancin kwarangwal...
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