differentiate between single and double purchase crab machine
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double purchase
winch crabs are used to lifting machine in which velocity ratio is increased by gear system if value insert gear is used .the winch is called single purchase .winch crab and if two sets are usedcalled double purchase crab machine .
winch crabs are used to lifting machine in which velocity ratio is increased by gear system if value insert gear is used .the winch is called single purchase .winch crab and if two sets are usedcalled double purchase crab machine .
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Explanation:
Winch crabs are basically the machines that are used to increase the velocity ratio in an existing gear system of any automobile. generally if there is only one set of gear system, then you can use the single purchase winch crabs and if there are two gear systems then then you can refer to the winch crab as the double purchase winch crab.
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