遵照毛主席“独立自主,自力更生”和“赶上和超过世界水平”的伟大教导,为了加速我国石油资源的开发,特别是海上油田和深部油层的开发需要,一机部兰州石油机械研究所、洛阳轴承研究所和冶金部大冶钢厂等单位联合研制了WZ4—172涡轮钻具滚动轴承支承节。在各级党委的关怀和支持下,于1975年在大学无产阶级专政理论的热 In order to speed up the development of China’s oil resources, especially the development of offshore oil fields and deep oil fields, Chairman Mao’s great teaching, “Independent, Self-reliance,” and “Catch-up and Exceeding World-class Standards,” a unit of Lanzhou Petroleum Machinery Research Institute, Luoyang Bearing Institute and the Ministry of Metallurgical Daye Steel and other units jointly developed WZ4-172 turbine drill bearing support section. With the care and support of party committees at all levels, the theory of proletarian dictatorship at the university in 1975 was hot