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鸡西煤矿专用设备厂设计、制造的YOXN-400型液力偶合器由东北内蒙古煤炭工业联合公司主持,于1989年3月22日通过了技术鉴定。
Designed and manufactured by Jixi Coal Mine Special Equipment Factory, YOXN-400 hydraulic coupling was presided over by Northeast Coal Industry Company of Inner Mongolia and passed technical appraisal on March 22, 1989.