Abstract: A distributed position detection rope includes: basic optical elements each including an optical fiber, tensile strength bodies, and a sheath material and the tensile strength bodies; a cylindrical inner sheath layer having a first optical element formed by arranging a plurality of the basic optical elements which are arranged at positions on the same circle and are helically wound at a predetermined pitch along the axial direction of the axis; and a cylindrical outer sheath layer on the outer side of the inner sheath layer and having a second optical element which are arranged at positions on the same circle and are helically wound along the axial direction so as to have a placement angle different from that of the basic optical elements of the first optical element.

Abstract: A room-temperature shrinkable tube includes an elastic tube stretched to cover a cylindrical shell. An object to be coated by the elastic tube is inserted into the cylindrical shell, and the cylindrical shell is slid out from the elastic tube, so that the resilience of the elastic tube brings it into contact with the surface of the object.