DEVICE FOR ENLARGING WELL BOTTOMS
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| creator | KHANOVICH IGOR ,SU POLOTSKIJ VLADIMIR M,SU TROFIMOV VLADIMIR E,SU TSEJTLIN MIKHAIL G,SU |
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| language | eng |
| recordid | cdi_epo_espacenet_SU615174A2 |
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| subjects | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS |
| title | DEVICE FOR ENLARGING WELL BOTTOMS |
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