Automation System
The coordinate system used to describe a workpiece:

All of these
is always two-dimensional
None of these
changes from part to part
is defined with respect to a point on the machine

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Automation System
A semi-continuous operation means:

None of these
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
the operation is continuous each shift, but stops between shifts
a computer is a required part of the machine
coffee breaks are allowed for the operator

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