Automation System
Straight-line operations:

All of these
must be limited to two per workpiece
None of these
can include diagonal cuts if they aren't curved
must be parallel to one of the axes of the coordinate system

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Automation System
Time proportioning control:

a and b above.
None of these
cannot use a TM990 micro¬computer
is less efficient than normal PID control
can be used on a PM550 programmable process controller

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