producing various single and double covering yarns, especially suitable for covering 2070D, 2070D, 3075D, 4075D ... , elastic yarn, metallic yarn as covered yarns;artificial synthetic fiber, cotton fiber, Dacron, silk, yarns as the covering yarn, producing varioussingle ... and double covering yarns, especially suitable for covering 2070D, 2070D, 3075D, 4075D ...