... couplings管接头，管箍 olets管座 plugs插头，丝堵 ...
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OLETs rely on three layers of material, with the bottom layers carrying a charge, the middle layer (the meat in this high-tech sandwich) emitting photons when excited by the bottom, and the top layer selectively letting those photos through.
ENGADGET: Organic Light Emitting Transistors might make us forget all about OLED
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