| http://www.w3.org/ns/prov#value | - Other copolymerizable constituents may also be present in the copolymer, such as styrene, vinyl naph- 'vinylidene chloride and the The nitrile rubber is used in a vulcanized form and is consequently mixed with such additives as are appropriate for that purpose, including sulfur or other vulcanizing agent, zinc oxide together with stearic acid and mercaptobenzothiazole or other combinations of vulc
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