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With chlorinated or unsubstituted naphthalenes or mixtures of isomeric chlorine or unsubstituted naphthalenes treated, in particular soaked and by means of solid coil for electrotechnical purposes
With chlorinated or unsubstituted naphthalenes or mixtures of isomeric chlorine or unsubstituted naphthalenes treated, in particular soaked and by means of solid coil for electrotechnical purposes
