| http://www.w3.org/ns/prov#value | - Thus, the microcapsules may be applied to the polymeric surface of the wall of a conduit 3 simultaneously with the binder 5; however, preferably, as illustrated in FIG. 2 the binder 5 is applied first, to plasticize the polymeric wall surface of the conduit 3 and make it tacky, and the microcapsules 1 are then applied to the surface, by sprinkling or other means.
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