| http://www.w3.org/ns/prov#value | - ir of flexible PCBs, a flexible film sandwiched by the flexible PCBs, and a mother board being connected to the flexible PCBs, one of the flexible PCBs being printed with a plurality of key-presses, the other one of the flexible PCBs being positioned with a plurality of touch pads corresponding to the key-presses, a plurality of holes being defined on the flexible film corresponding to the key-pre
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