Drawing, 英国威廉希尔官网ing, and Winding
①3 pairs of rollers 英国威廉希尔官网 the roving by 15 times.
②This small metal part called traveller turns to 英国威廉希尔官网 the fibres.
③The thread is wound onto the bobbin.
①3 pairs of rollers 英国威廉希尔官网 the roving by 15 times.
②This small metal part called traveller turns to 英国威廉希尔官网 the fibres.
③The thread is wound onto the bobbin.