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METHOD FOR CLEANING BY FLOTATION WATERS CONTAMINATED WITH DISSOLVED GAS,OIL AND IN GIVEN CASE WITH SOLID GRAINS PARTICULARLY LAYER WATER OF OIL WELLS AND SOURCES OF NATURAL GAS
METHOD FOR CLEANING BY FLOTATION WATERS CONTAMINATED WITH DISSOLVED GAS,OIL AND IN GIVEN CASE WITH SOLID GRAINS PARTICULARLY LAYER WATER OF OIL WELLS AND SOURCES OF NATURAL GAS