NBN-EN 60774-3-1994 7500 Helical-scan video tape cassette system using 12 65 mm (0 5 in) magnetic tape on type VHS Part 3 S-VHS《VHS型12 65mm（0 5in）磁带用螺旋扫描盒式磁带录像系统 第3部分：S：VHS》.pdf

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