Machine Design
In composite or reverse laid ropes

Direction of twist of wires in strands is opposite to the direction of twist of strands
Wires are not twisted
Direction of twist of wires and strands are same
Wires in two adjacent strands are twisted in opposite direction

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Machine Design
The contact ratio is the ratio of

Length of arc of approach to the circular pitch
Length of arc of contact to the circular pitch
Length of arc of recess to the circular pitch
Length of path of contact to the circular pitch

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