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全球每年有超过700万吨球墨铸铁管的销售,其中中国就达到170万吨左右。中国的球墨铸铁管的年生产能力达到250万吨,每年的出口超过50万
Over 7 million tons of ductile iron pipe are sold each year in the world, of which China has reached about 1.7 million tons. China’s ductile iron pipe annual production capacity reached 2.5 million tons, more than 500,000 annual exports