If L1 and L2 are actual and theoretical lengths of a tongue rail, d is heel divergence and t is thickness of tongue rail at toe, the switch angle α is

If L1 and L2 are actual and theoretical lengths of a tongue rail, d is

1.	If L1 and L2 are actual and theoretical lengths of a tongue rail, d is heel divergence and t is thickness of tongue rail at toe, the switch angle α is
A.	A
B.	B
C.	C
D.	D
Answer» B. B