Automation System
Stepping motors:

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

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Automation System
A discrete parts process is:

None of these
normally a repetitive series of operations
often encountered in manufacturing
the same as a continuous process except a different controller must be used
(b) and (c)

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