DIFF Subgroup
B28B 7/285 Full Title
Moulds; Cores; Mandrels (specially adapted for the production of the tubular articles B28B21/00; ) > Cores; Mandrels
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B28B 7/285 Moulds; Cores; Mandrels (specially adapted for the production of the tubular articles B28B21/00; ) > Cores; Mandrels