resistance (between about and ohms ) varied inversely with the light falling upon it, i.e., its resistance was higher when dimly lit, lower when brightly lit. the selenium cell took the place of a carbon microphone—also a variable-resistance device—in the circuit of what was otherwise essentially an...
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distribution control system (edcs). the project has helped create an intelligent industrial park, the equivalent size of over football pitches, through improving electrical stability and digitalizing its power management. shanghai waigaoqiao ftz is the first of its kind in china. it was founded years...
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