Auspuffrohr mit Schalldaempfer

摘要

1363884 Making exhaust systems SPIRALO HOLDING AG 21 June 1971 [25 June 1970] 03057/74 Divided out of 1363883 Heading B3A The disclosure is the same as that of parent Specification 1,363,883, but the claims relate to making a part of an exhaust system by screwing together two tubular members using as threads one or more longitudinal corrugations formed in the metal strip which is helically wound and closed by a helical, gas-tight seam to form the tubular members.