THE first floor is all about components: every type of switch, every cable and every screw can be found here, often in bags of thousands. The second floor is filled with circuit boards and small gadgets, from video cameras to headsets. The higher you go, the bigger and more sophisticated the devices get: smartphones, drones, hoverboards. On the top floor, the tenth, a blinding cornucopia of leds of every shape and colour assails the eyes.
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