| http://www.w3.org/ns/prov#value | - is in the closed position a bottom end face of the cap essentially contacts the second side of the flange member; connecting means for connecting the cap to the flange member, said connecting means being integrally formed in one piece with the flange member and the cap, said connecting means including a first connecting portion that extends radially outwardly from the outer periphery of the flang
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