Automation System
Stepping motors:

can run at varying speeds
do not require commutators
can run both clockwise and counterclockwise
All of these
can be built to index different amounts by changing the pole configuration

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Automation System
Most industrial control applications:

can be solved using more than one method of control
All of these
can be done more reliably using solid-state methods
None of these
must have the process specified correctly to be successful

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