The approximate number of fibres in a card silver in between ..........and ............

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