| http://www.w3.org/ns/prov#value | - The polymer tubing segments 272 are attached to a nylon or polyimide tubing 274 using glue or a heat seal, as in the embodiments shown in FIGS. 44B and 45B. The polymer tubing segments 272 defining the multiple ring portions 271 are filled with a radioactive material and are sealed by a plug or other suitable means at their free ends.
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