Automation System
Numerical control:

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
All of these

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Automation System
An aneroid barometer

can measure only atmospheric pressure
measures pressure by sensing deflection of an evacuated chambers.
is very unreliable
None of these
can be used to measure gas or liquid flow rates

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