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采购商专属商务读本供应商品牌进阶通道《石油石化物资采购》杂志由中国石油天然气集团公司创办,中国石油学会主管,是石油
Buyer Exclusive Business Reader This brand of advanced supplier channel “Petroleum and petrochemical materials procurement” magazine by the China National Petroleum Corporation founded the Chinese Petroleum Institute, is the director of oil