Description: alphanumeric character sequence assigned to a fabricated product, which allows the date, time and circumstances of fabrication to be traced; Name: Number of fabrication
Description: alphanumeric character sequence assigned to a fabricated product, which allows the date, time and circumstances of fabrication to be traced; Name: fabrication number
Description: A norm-based numbering of the materials. The reference to a norm unambiguously describes the material; Name: Material number of the membrane