| http://www.w3.org/ns/prov#value | - ping end and a body end, a fixation ring having a bore therethrough, a probe end and a body end, being removably attached to said housing and on which said seal is mounted including means for positively mounting said selectively permeable seal thereon cooperative interlocking means on said housing and on said fixation ring for positively attaching said fixation ring to said housing with said seal
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