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    • Haiyun Asphalt

      Asphalt is a brownish-black mixture of hydrocarbons with different molecular weight and non-metallic derivatives and

    • Brominated isobutylene-isoprene rubber

      Brominated isobutylene-isoprene rubber (BIIR) is a isobutylene-isoprene copolymer elastomer containing active bromine

    • Isobutylene-isoprene rubber

      Isobutylene-isoprene rubber (IIR) has excellent chemical and thermal stability with its most prominent feature being

    • Polybutene Alloy

      Shandong Chambroad Petrochemicals Co , Ltd , together with research team from Qingdao Science and Technology Univers

    • Polypropene

      Chambroad Petrochemical polypropene powder is produced us

    • Trans-1,4-poly(butadiene-co-isoperne) rubber

      Trans butadiene rubber is a kind of functional rubber material with excellent performance It can solve the compa

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      强 暴 疼 哭 处 女 身子视频,国产av无码专区亚洲av手机麻豆,被窝电影,metart极品人体