Retarder and Speed Regulation Technology (quarterly) was founded in 1984, sponsored by the Research Institute of Retarder Speed Regulation System of Harbin Railway Bureau and the Professional Committee of Retarder Speed Regulation System of China Railway Society. This journal focuses on the new achievements in the research and design of retarder speed control system, the practical experience in the test, application and maintenance management of AC retarder speed control system, analyzes and solves the problems existing in popularization and application, and reports the present situation and trend of theoretical research and application of hump formation speed control technology at home and abroad.
Journal of Zhengzhou Railway Vocational and Technical College (Quarterly) was founded on 1998 and sponsored by Zhengzhou Railway Vocational and Technical College. Our magazine adheres to the direction of serving socialism, adheres to the guidance of Marxism-Leninism, Mao Zedong Thought and Deng Xiaoping Theory, implements the principles of "letting a hundred flowers blossom and a hundred schools of thought contend" and "making the past serve the present and making foreign things serve China", adheres to the rigorous style of study of seeking truth from facts and integrating theory with practice, disseminates advanced scientific and cultural knowledge, promotes national excellent scientific and cultural knowledge, promotes international scientific and cultural exchanges, and explores the laws of higher education, teaching and management.
With the continuous development of national economy and comprehensive national strength, China enterprises have made great progress in marketing. The following is what I collect