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Powerful and Hybrid Programmable Controller 
In the beginning there was the timer and the relay, There was the hardwired controller and in the process industries. Some decades ago, digital electronics made the hardwired relay and controller obsolete in favor of the PLC, the programmable logic c...
http://program-plc.blogspot.com/2011/03/powerful-and-hy
brid-programmable.html
first added by thesarah, last updated 1 years 2 months ago
brid-programmable.html
