{HEAD ~ The method} includes the steps of: providing fibers of a desired length; treating the fibers with a treating liquid made up of a nitrile rubber modified epoxy resin and an alkylphenol•formaldehyde resin; and dispersing {TAIL ~ the treated fibers} in rubber 
{ HEAD ~ The method } includes the steps of : providing fibers of a desired length ; treating the fibers with a treating liquid made up of a nitrile rubber modified epoxy resin and an alkylphenol•formaldehyde resin ; and dispersing { TAIL ~ the treated fibers } in rubber
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