| http://www.w3.org/ns/prov#value | - In a fire sensing and detecting system including a frame, a cylindrically shaped adapter having a throughgoing aperture and external threads, a ridge forming a butting surface surrounding the aperture at the midpoint between the ends, extending through an aperture in a wall of the frame and secured by the butting surface engaging the wall on one side and a nut threaded on the adapter from the oppo
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