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Kola superdeep borehole in Murmansk region
USSR. Murmansk Region. Employees of the laboratory of control and measuring instruments, adjuster Viktor Lokhmanyuk and senior engineer Sergei Chinarov (from left to right) during the observation of the condition of the drilling equipment of the Uralmash-15000 rig during the drilling of the Kola superdeep borehole for geophysical research at great depths. The exact date of the shooting has not been established. Semyon Meisterman/TASS