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由冶金部与统配煤矿总公司共同主持的“矿用高频焊接钢管鉴定订货会”于1991年8月26日至27日在徐州召开。
Hosted by the Ministry of Metallurgy and General Assembly Coal Corporation co-chaired the “mining high-frequency welded steel pipe appraisal Ordering Meeting” August 26, 1991 to 27 in Xuzhou.