| http://www.w3.org/ns/prov#value | - Where different materials are used for forming the coils 31, 32, it is possible, for example, to use a noble metal such as gold and platinum for the distal end side coil 31 and a stainless steel for the proximal end side coil 32, or to use a superelastic alloy for the distal end side coil 31 and a stainless steel for the proximal end side coil 32.
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