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U N I V E R S I T Y O F O U L U P . O . B o x 7 5 0 0 F I - 9 0 0 1 4 U N I V E R S I T Y O F O U L U F I N L A N D
A C T A U N I V E R S I T A T I S O U L U E N S I S
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SCIENTIAE RERUM NATURALIUM
HUMANIORA
TECHNICA
MEDICA
SCIENTIAE RERUM SOCIALIUM
SCRIPTA ACADEMICA
OECONOMICA
EDITOR IN CHIEF
EDITORIAL SECRETARY
Professor Mikko Siponen
Professor Harri Mantila
Professor Juha Kostamovaara
Professor Olli Vuolteenaho
Senior assistant Timo Latomaa
Communications Officer Elna Stjerna
Senior Lecturer Seppo Eriksson
Professor Olli Vuolteenaho
Publication Editor Kirsti Nurkkala
ISBN 951-42-8077-6 (Paperback)
ISBN 951-42-8078-4 (PDF)
ISSN 0355-3213 (Print)
ISSN 1796-2226 (Online)
U N I V E R S I T AT I S O U L U E N S I S
ACTA
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TECHNICA
OULU 2006
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Tuomas Stoor
AIR IN PULP AND
PAPERMAKING PROCESSES
FACULTY OF TECHNOLOGY,
DEPARTMENT OF PROCESS AND ENVIRONMENTAL ENGINEERING,
UNIVERSITY OF OULU
C 243
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omas Stoor
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