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    2007年1～5月份我國鋼管行業(yè)產(chǎn)量、進(jìn)出口量情況及下半年形勢(shì)預(yù)測(cè)

    The production outputs and import/export volumes of domestic steel tube-making circles during the period from January to May, 2007 and forecast for relevant situation in second half of the year

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