If S is the switch angle and α is diamond angle, r is the radius of slip, the distance between middle point slip and the nose of obtuse crossing, is

If S is the switch angle and α is diamond angle, r is the radius of s

1.	If S is the switch angle and α is diamond angle, r is the radius of slip, the distance between middle point slip and the nose of obtuse crossing, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

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If S is the switch angle and α is diamond angle, r is the radius of slip, the distance between middle point slip and the nose of obtuse crossing, is

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