| http://www.w3.org/ns/prov#value | - To this end the cable 23 comprises, starting from the centre, pulling cable 70 made of a strong material, such as Kevlar (registered trade mark), three coaxial electric conductors 72a, 72b and 72c and an external protective sheath 74 of an insulating plastic material, on which olive-shaped protuberances or floaters 76 are moulded at regular intervals.
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