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International Standard Category: Video systems

GB/T 7398-1987    Helical-scan video-tape cassette system using 19mm magnetic tape, known as U-format
U型19mm螺旋扫描盒式磁带录像系统 ;
Category No.:33.160.40 Valid Status:abolished
Issued Organization:National Bureau of Standards Issued Date:1987-03-12
Implemented Date:1987-1-1 Abolished Date:2005-10-14
Superseded Standard.: Superseded Date:
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