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PCE
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CPC Subgroup
G11B 5/004

Recording on, or reproducing or erasing from, magnetic drums (G11B19/00 takes precedence)

Full Title

Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence) > Recording on, or reproducing or erasing from, magnetic drums (G11B19/00 takes precedence)