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BE631799A - Google Patents BE631799A - Google Patents Info Publication number BE631799A BE631799A BE631799DA BE631799A BE 631799 A BE631799 A BE 631799A BE 631799D A BE631799D A BE 631799DA BE 631799 A BE631799 A BE 631799A Authority BE Belgium Prior art keywords fixed profiles profile profiled desc Prior art date Application number Other languages French ( fr)