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

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

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Automation System
An aneroid barometer

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

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