| http://www.w3.org/ns/prov#value | - End plug 70 has a peripheral rim section 74 having a notch 76 therein in which a sealing member such as a rubber ring or gasket is positioned, which gasket presses against the inner wall of holding chamber 12 and provides an airtight seal between the inner and outer chambers as the inner chamber 14 is slidingly moved in and out of holding chamber 12.
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