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A cotton warper is someone who works in a cotton mill, overseeing the industrial process of winding threads from a lot of different bobbins onto a "warp beam", which is one large bobbin at the back of the loom and containing all the warp threads to be used by the loom, which will be gradually unwound during the weaving process, releasing the threads a bit at a time to be woven into the cloth. Warping is the second stage of cotton cloth production, following Winding.