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Priority to PL386678ApriorityCriticalpatent/PL213347B1/pl
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Publication of PL213347B1publicationCriticalpatent/PL213347B1/pl
OPTICAL SYSTEM WITH VARIABLE PERFORMANCE, OPTICAL DEVICE EQUIPPED WITH THE OPTICAL SYSTEM WITH VARIABLE PERFORMANCE, AND METHOD FOR PRODUCING THE OPTICAL SYSTEM WITH VARIABLE PERFORMANCE
Closure with improved rotation-inhibiting projectiDevice and method for short-circuiting one or morecells in an arrangement of electrolysis cells int ons ended for the production of aluminium