Automation System
Numerical control:

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

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Automation System
Semiconductor devices:

are less reliable than electro¬mechanical components
have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
All of these
None of these

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