【正确答案】Fibers are subjected to intensive opening between the feed roller and the takerin, and between the stationary combing bar and the takerin, all the trashes held in the cotton fed to the card, about half of trashes are removed at the takerin section. Fibers are transferred from the takerin to the swift (or cylinder) by a stripping action. The swift carries the fibers pass through the carding working zone composed by swift and flats, and interchange of the projecting fibers takes place between the flats and the swift, short fibers, neps, and trash will tend to remain in the flat clothing. After these flats move out from the carding zone, the fibers and trash particles retained by the flats are removed by the flat doffing comb and cleaning brush. The fibers retained by the swift are transferred to the doffer and in turn are removed from there by the doffing comb or a doffer drawoff roller arrangement.