In a rolling process, the maximum possible draft, defined as the difference between the initial and the final thickness of the metal sheet, mainly depends on which pair of the following parametersP : StrainQ : Strength of the work materialR : Roll diameterS : Roll velocityT : Coefficient of friction between roll and work

In a rolling process, the maximum possible draft, defined as the diffe

1.	In a rolling process, the maximum possible draft, defined as the difference between the initial and the final thickness of the metal sheet, mainly depends on which pair of the following parametersP : StrainQ : Strength of the work materialR : Roll diameterS : Roll velocityT : Coefficient of friction between roll and work
A.	Q, S
B.	R, T
C.	S, T
D.	P, R
Answer» C. S, T