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由冶金工业部聘请的冶金、煤炭两个专家小组,于一九八五年一月十五日至十七日在郑州对金属制品研究所设计、抚顺煤炭工业学校制造的 JWJ—6型金属线材反复弯曲试验机进行了鉴定。经过严格的资料审查和
Two metallurgical and coal experts hired by the Ministry of Metallurgical Industry to design the JWJ-6 metal wire rod manufactured by Fushun Coal Industry School in Zhengzhou from January 15 to January 17, 1985. Repeated bending test machine was identified. After strict information review and