Passageway lining material

摘要: The tensile strength, and particularly the ability to resist changes in cross-sectional configuration, of a rigidifiable-in-situ passageway lining material comprising fibrous body with settable resin forming part thereof, fibers that having their lengths generally extending transversely plane is enhanced by incorporating thereinto reinforcing layer formed lining, preferably circumferentially when defines tube. A pair such layers may be provided, each near different surface thereby simultaneously protect against buckling ovality.