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一九六九年我们共同协作已试制成功东风25型中频电动凿岩机。为了减少凿岩机的配套设备，直接利用现有工业电源，在研究中频凿岩机的同时，也开展了工频电动机的研制。为了加快步伐，早日完成工频电机的研制任务，遵照毛主席“独立自主、自力更生”的方针，破除迷信，解放思想，积极努力，经过较长时期的试验研究和多次改进设计，终于试制成功2瓩工频水冷电机。经过生产试验，证明电动机的各项性能达到了设计要求，基本上能满足生产使用的需要。该机已于1976年12月23日至28日，在国家地质总局科技组主持下，在浙江省龙游探矿厂召开了全国地质系统有关单位鉴定会进行了鉴定。现将该机的特点、结构、性能和试验情况分述如下。
In 1969, we worked together to successfully trial Dongfeng 25 medium frequency electric rock drill. In order to reduce the supporting equipment of rock drills, direct use of existing industrial power supply, research in the frequency of rock drills at the same time, also carried out the development of the power frequency motor. In order to speed up the pace, the task of research and development of power frequency motor was completed as soon as possible. Following Chairman Mao’s principle of “independence and self-reliance”, we have to get rid of superstition, emancipate our minds and work hard. After a long period of experimental research and design improvement many times,瓩 power frequency water-cooled motor. After the production test to prove that the performance of the motor to meet the design requirements, basically able to meet the needs of production and use. The aircraft has been December 23, 1976 to 28, under the auspices of the State Bureau of Geology and Technology Group, held in Longyou prospecting plant in Zhejiang Province, the identification of the relevant units of the geological system were appraised. Now the machine features, structure, performance and test conditions are as follows.