It is the result of a scientific drilling effort to penetrate as deeply as possible into the Earth's crust conducted by the Soviet Union in the Pechengsky District of the Kola Peninsula, near the Russian border with Norway.OverviewThe Kola Superdeep Borehole SG-3 (: Кольская сверхглубокая скважина СГ-3, : Kol'skaya sverkhglubokaya skvazhina SG-3) is the on Earth (since 1979), whic. .
Drilling at Kola SG-3 began on 24 May 1970 using the -4E, a serial drilling rig used for drilling . The rig was slightly modified to be able to reach a 7,000-metre (23,000 ft) depth. In 1974, the new purpos. [pdf]
The construction of the Ural Heavy Machinery Plant began in 1926, and in 1928 a special "socialist city []" for its workers was also elected. The plant began operations in 1933 in compliance with the plans of the for the of the country. During the pre-World War II period, Uralmash was dependent on foreign specialists and equipment. It was reporte. [pdf]
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