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为了贯彻伟大领袖毛主席的“独立自主,自力更生”方针,走自己工业发展道路,一九七四年初,由上海南汇化肥厂、上海材料研究所、上海电化厂、上海压缩机厂、上海吴泾化工厂、上海嘉定化肥厂等单位组成压缩机无油润滑协作组,对化肥行业普遍使用的几种高压压缩机实现无油润滑进行了研究试验。 2D6.5-7.7（9）/150型氮氢气压缩机,是目前小化肥厂使用得较广泛的主机。该机四级活塞环承压高,压差大,原来采用填充聚四氟
In order to carry out the principle of “independence, self-reliance and self-reliance” of great leader Chairman Mao and his own path of industrial development, the project was started in 1974 by Shanghai Nanhui Fertilizer Plant, Shanghai Institute of Materials, Shanghai Electrochemical Factory, Shanghai Compressor Factory, Shanghai Wujing Chemical Plant , Shanghai Jiading Fertilizer Plant and other units of the Compressor Oil-free Lubrication Team, the fertilizer industry widely used several high-pressure compressor oil-free lubrication carried out research. 2D6.5-7.7 (9) / 150 type nitrogen and hydrogen compressor, is currently the main fertilizer used in a more extensive host. The plane four piston rings high pressure, pressure, the original use of PTFE filled