| http://www.w3.org/ns/prov#value | - h gasket 42, the operator can ascertain the longitudinal position of light port 56 within balloon 46. [0070] For example, by rotating and advancing or withdrawing outer sleeve 60, once it has been fixed in place by compressing inner sleeve 58 on conduit 41, light energy may be emitted for selected periods of time, for example, such as at the 3, 6, 9 and at 12 o'clock positions at each of positions
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