| http://www.w3.org/ns/prov#value | - In order to implement the above construction in which the surface 22 a and the input keys 3 includes reflective surfaces, and the light source for lighting the input keys 3 is capable of illuminating the LCD 1, the surface 22 a and the input keys 3 may be made of such material as is semi-reflexible and also semi-pervious to the incident light.
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