Automation System
An aneroid barometer

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

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Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

technical assistance must be provided to the user.
None of these
there should be a common 3-D part description system.
the user must have access to both hardware and software
the system must make provision for new techniques.

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