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hydrocarbon resin Puyang Ruisen Petroleum Resins Co., Ltd established in August 2004, is a new-type joint-stock enterprise , encompassing technological dev |
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Hydrocarbon Resin Petroleum Resin,hydrocarbon Resin,c5 Petroleum Resin,c5 Hydrocarbon Resin,c9 Petroleum Resin,c9 Hydrocarbon Resin |
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