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STEELPIPE2004熏Vol.33钢管2004年第33卷EXPERTFORUMCurrentproductionsituationandtechnicaldeficiencyofanddevelopmentproposalsfordomesticseamlesssteeltubeindustry………………………………………………………………………………………………JiangYongjingChengHaitao(3
STEELPIPE2004 smoked Vol.33 Pipes 2004 Volume 33 EXPERTFORUMCurrentproductionsituationandtechnicaldeficiencyofanddevelopmentproposalsfordomesticseamlesssteeltubeindustry ........................................................................................................ JiangYongjingChengHaitao ( 3