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1991-08-14
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1989-02-22
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1992-03-18
Catalyst for purification of exhaust gases
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1989-06-22
Catalyst for the purification of exhaust gases
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1989-04-13
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1993-09-06
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1988-05-26
Catalyst for the purification of exhaust gas
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1989-11-30
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1986-11-13
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1989-10-25
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1986-08-20
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1990-12-19
Catalyst for purification of exhaust gases
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1987-04-15
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1990-03-28
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1988-01-07
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1985-07-25
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1986-07-29
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1991-01-16
Method for purifying high-temperature reducing gas
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1994-03-30
Apparatus for purifying NOx - containing gas
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1989-11-09
A method for encasing a catalytic unit used for the purification of exhaust gases
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1985-11-20
Purifying exhaust gases
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1984-05-16
Exhaust gas purification catalysts
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1985-04-24
Purifying exhaust gas
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1989-01-23
Apparatus for catalytically purifying exhaust gases
PL253978A1
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1986-12-30
Apparatus for catalytically purifying exhaust gases