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GOVERNMENT OF INDIA

                                       MINISTRY OF RAILWAYS

                                            (RAILWAY BOARD)







                                 INDIAN RAILWAYS


                          SIGNAL ENGINEERING MANUAL

                                                    (IRSEM)







                                                     July 2021














                                                     Published by:
                  Indian Railways Institute of Signal Engineering and Telecommunications, Secunderabad

                      For Government of India, Ministry of Railways (Railway Board), New Delhi
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