Automation System
Direct Numerical Control means:

complete elimination of a need for a human operator.
None of these
using several computers to control one large machine
using one computer to control several machines
eliminating computers from the manufacturing process

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

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

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