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Priority claimed from DE8803558Uexternal-prioritypatent/DE8803558U1/de
Priority claimed from DE3830627Aexternal-prioritypatent/DE3830627A1/de
Application filed by Kwh Pipe Ab Oy, Henze GmbhfiledCriticalKwh Pipe Ab Oy
Application grantedgrantedCritical
Publication of ATE79799T1publicationCriticalpatent/ATE79799T1/de