| http://www.w3.org/ns/prov#value | - The small end 17 of second outer cone member 13 is closely received within the socket 45 of first outer cone member 12, and the large end 21 of second outer cone member 13 is closely received over the outer surface of housing member 3 and attached thereto by means such as welding or the like to create an airtight seal therebetween.
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