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

In cotton combing, oil extraction increases