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1987-11-18
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1984-02-15
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1976-08-17
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1986-05-21
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1985-01-15
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1977-08-12
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1978-07-17
METHOD OF PROCESSING WASTE SULFURIC ACID AND IRON SULPHATE SIXOHATE TO FRESH ACID
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1981-10-23
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1984-07-20
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1985-07-06
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1979-04-19
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1976-10-15
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1985-06-26
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1985-09-28
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1978-08-14
METHOD OF DETERMINATION OF DILUTED PHOSPHORIC ACID
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1985-07-26
PROCESS TO PROTECT IRON AND STEEL AGAINST CORROSION
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1983-09-15
METHOD FOR OBTAINING DERIVATIVES OF 7-BETA- AMINOTHIAZOLILACETAMIDO-3-CEPHEM-4-CARBONIC ACID
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1986-03-16
DEVICE FOR THE REDUCTION OF IRON AND VANADIUM IN PHOSPHORIC ACID SOLUTION
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1979-05-02
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1975-12-25
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1978-11-20
METHOD OF INHIBITION OF THE ACID CORROSION OF IRON AND ZINC IN PICKLING FLASK
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1979-04-10
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1979-09-14
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1979-09-24
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1978-12-04
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