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Steel tape pressed into the drum surface.
钢带将胶布紧压在鼓的表面上。
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Magnetic drum Cylinder having a magnetic surface on which to store data.
有磁性表面，可贮存数据的圆筒。
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Magnetic drum Cylinder having a magnetic surface on which to store data.
有磁性表面，可贮存数据的圆筒。
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