| http://www.w3.org/ns/prov#value | - In preferred embodiments, frame 17 is formed of aluminum or other suitable material to also serve as a heat sink for electronic components located internally to back box 12.FIG. 2 is an exploded view showing these same and other components.Back box 12 serves to enclose low voltage electronic components such as may include lighting controls, control keypads, audio amplifiers, intercom circuits, spe
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