The range of draft required to convert the silver into yarn is

During the bobbin winding in a roving frame, the bobbin rotation rate must be...........while the increase in the package diameter.

Soft covering of top rollers in ring frame leads to 

For woolen and worsted spinning system, the type of ring used is

The increase in traveller weight leads to an increase in

If two yarns each of 40 Ne count is twisted together, the resultant count would be