The fibres in card silver are relatively

For fines silvers, what is the relation between the diameter of trumpet bore (d) and linear density in tex ?  

The yarn relationship between yarn diameter and twist is 

The blending technique that gives homogeneous mixing of fibre is

Front top roller of a drafting system would normally arranged (when looked from the front side as the drafting system) on the front bottom roller with

The combing force increases with