Automation System
One of the major benefits of using CAD in tool design is that:

it simplifies the trial-and-error method
there is better coordination in the materials-handling area
tool motions can be checked to see if there is interference between the tool and the object
product design represents approximately one-half the engineering costs
None of these

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Automation System
Numerical control:

None of these
is a method for controlling the operation of a machine by means of a set of instructions
is a method for producing an exact number of parts per hour
applies only to milling machines
All of these

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