| http://www.w3.org/ns/prov#value | - comprises the same four wires 12, 13, 14 and 15 which form the previously described tools, these wires having the same diameter and pitch of the helix and being wound into a four-strand helical coil, the turns of which lie closely adjacent each other, except for a portion of its length next to the end defining the guide section or flexure area 25, shown in FIG. 5, of the probe.
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