Carding room equipment can traditionally be broken down into three machines (or sometimes just two, when the raw material requires less intensive treatment) and a number of drums that is determined by the type of processing being carried out.
The carding action is repeated a number of times on each of the machines, thus, by the time they are delivered as a web, the fibres have undergone a considerable number of processing stages, which have left them clean and reasonably parallel with one
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