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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Store in seal drum at room , dry place , usable life 2 year.

产品密封包装后贮存于阴凉、干燥处，贮存期一年。

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Store in seal drum at room , dry place , usable life 2 year.

产品密封包装后贮存于阴凉、干燥处，贮存期一年。

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