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Priority to SU874334830ApriorityCriticalpatent/SU1488479A1/en
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SU874334830A1987-10-191987-10-19Electromechanical probe for determining the depth of rock caving-in and muck heaps height in excavated space
SU1488479A1
(en)
Machine for and method of continuously disintegrating a rock or the like and taking away disintegrated output for use in mining,earth moving and tunnel driving