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1974-12-16
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1974-05-31
PROVISION FOR THE MECHANICAL BIOLOGICAL PURIFICATION OF WASTE WATER
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1974-12-27
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1974-05-13
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1977-11-17
SYSTEM TO ELIMINATE SLUDGE DEPORTS IN STEAM GENERATORS
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1973-10-15
PROCESS FOR RECOVERING CONSTITUENTS OF USED HYDRODESULFURATION CATALYSTS
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1971-12-27
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1973-11-26
PROCESS FOR PREVENTING CORROSION AND THE FORMATION OF SCALE IN A WATER CIRCULATION SYSTEM,
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1975-05-20
METHOD FOR ENCAPSULATING SUBSTANCES NOT MISCIBLE TO WATER
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1977-05-20
PROCEDURE AND PLANT FOR THE PURIFICATION OF WASTE WATER FOR USE AS RECIRCULATION WATER
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1976-12-07
Waste water purification system
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1974-05-20
ROTATING FILTER FOR THE BIOLIGIC PURIFICATION OF WASTE WATER
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1981-03-30
MICELLAR SOLUTION "IN WATER" FOR THE RECOVERY OF PETROLEUM FROM UNDERGROUND
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1975-05-20
PROCESS FOR THE PURIFICATION OF WASTE WATER
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1974-01-21
PROCEDURE AND PLANT FOR THE PURIFICATION OF WASTE WATER
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1975-08-18
REACTOR FOR WATER PURIFICATION BY FLUID FILTRATION
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1977-02-01
Method for purifying waste water
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1976-07-13
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1974-08-10
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
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1973-02-01
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BR7405548D0
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1975-05-13
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1980-01-15
REMOVAL METHOD FOR RELIABILITY OF ENERGY CONVERSION SYSTEMS IN URBAN TRACTION
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1976-03-19
ENCAPSULATION PROCESS FOR SUBSTANCES NOT MISCIBLE TO WATER
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1974-03-06
IMPROVED PROCESS FOR THE RECOVERY OF CYANHYDRIC ACID
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1972-08-16
MOBILE INSTALLATION FOR WATER PURIFICATION