Automation System
Robots can increase productivity because:

All of these
they do not take a vacation
production quality is uniform
None of these
they do not get tired

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Automation System
The use of specialized workstations:

reduces the host computer workload and allows more users
provides limited growth potentials for 3-D
reduces the host computer workload
None of these
has a high cost-performance tradeoff

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Automation System
A dc servo motor:

uses a variable dc voltage for speed control
All of these
uses a tachometer for speed feedback
None of these
can provide precise position control

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