| http://www.w3.org/ns/prov#value | - evice being elongate and having such dimensions as to be insertable into the vessel and having two states, in a first state of which the device has a shape that is adaptable to the shape of the vessel, and to the second state of which the device is transferable from said first state, said device comprising a fixing means for fixing the ends of the device within the vessel, when the device is first
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