GB 9415.1-1988 Disk platters for information processing and data storage equipment with an outer diameter of 130mm, an inner diameter of 40mm, and 83,000 magnetic flux reversals per track (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB 9415.1-1988
GB 9415.1-1988 history
1988GB 9415.1-1988 Disk platters for information processing and data storage equipment with an outer diameter of 130mm, an inner diameter of 40mm, and 83,000 magnetic flux reversals per track