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Baigul - Karazhal - a section of the Karaganda - Karazhal line of the Kazakhstan railway.
In the period 1986–1990 Lengiprotrans developed a project for electrical interlocking (EC) of 3 stations of the railway line with 46 turnouts.
This contributed to ensuring a high level of train traffic safety, increasing the station's throughput, strengthening power supply devices and improving the quality of personnel.