FRONT ROLL, 1 IN. DIA.
Allowance has been made for doffing, etc. Twist per inch, 4.75 x square root of number up to 40s. For 40s and finer the twist per inch is graduated from 4.60 to 4.00 x square root of number.
Allowance has been made for doffing, etc. Twist per inch, 4.75 x square root of number up to 40s. For 40s and finer the twist per inch is graduated from 4.60 to 4.00 x square root of number.