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

None of these
product design represents approximately one-half the engineering costs
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
it simplifies the trial-and-error method

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Automation System
Straight-line operations:

All of these
can include diagonal cuts if they aren't curved
must be parallel to one of the axes of the coordinate system
must be limited to two per workpiece
None of these

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Automation System
Numerical control:

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

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