Evgeni D. Hromin

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Moscow, SU

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Patents Grantslast 30 patents

Information Patent Grant
Face shock absorber for extracting core-collecting pipes
- Patent number 5,083,755
- Issue date Jan 28, 1992
- Geologoprouchvatelno Predpriatie
- Nikolay D. Nenkov
- E21 - EARTH DRILLING MINING