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由东北工学院负责设计、上海第一石油机械厂制造、鞍山大孤山铁矿试验的φ250/φ310型矿用扩孔器的研制,经过三年多的努力,已经获得成功。于1981年12月14～16日在上海召开了该项设备的技术鉴定会。参加这次会议的有全国有关22个单位,36名代表。会议期间,代表们认真听取了研制和试验单位所做的有关φ250/φ310型扩孔器的技术报告,并且参观了扩孔器的样品。会议审议了φ250/φ310型扩孔器的九篇技术文件,井对其中的一些主要试验数据,进行了复
The design of the φ250 / φ310 mining reamer, manufactured by the No.1 North Petroleum Machinery Factory and the Dagushan Iron Mine in Anshan, was designed by Northeast Institute of Technology. After more than three years of hard work, it has been successful. In December 1981 December 14 to 16 held in Shanghai, the equipment of the technical appraisal. There are 22 units and 36 representatives nationwide participating in this conference. During the meeting, delegates listened attentively to the technical reports made by the research and test units on the φ250 / φ310 reamer and visited the reamer samples. The meeting reviewed nine technical documents for the φ250 / φ310 reamer, and conducted some of the major experimental data