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Application filed by Pfefferkorn HerbertfiledCriticalPfefferkorn Herbert
Priority to AT461873ApriorityCriticalpatent/ATA461873A/de
Publication of ATA461873ApublicationCriticalpatent/ATA461873A/de
AT461873A1973-05-251973-05-25Vorgefertigter umfangsgeschlossener tunnel- oder kanalartiger betonhohlkorper und schalung zu seiner herstellung
ATA461873A
(de)