1. a substance that makes the fixed-format (Vulcanizing Agent) rubber insert so that the rubber is flexible State status. These groups include: sulfur2. some substances (Protective Agent) sanklum that include substances such as ozone.3. the substance to help in the production process, such as oil, allowing the tyre compound possesses a wide appeal.4. other substances such as additives that cause the tire to tire, or color of the Fu of different groups is:
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