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未记录计测磁带的物理性能和测试方法
价格：￥0.00
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盒式录音磁带电性能与机械性能测量方法
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盒式录音磁带通用规范
General specification for audio cassettes
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信息处理交换用9磁道12.7mm宽63行/毫米调相制记录磁带
Information processing-9-track, 12.7mm wide magnetic tape for information interchange recorded at 63rpmm,phase encoded
价格：￥0.00
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35mm磁片上六声轨录音磁头的隙缝位置和宽度尺寸
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35mm磁片上四声轨录音磁头的隙缝位置和宽度尺寸
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信息处理交换用9磁道12.7毫米宽32行/毫米记录磁带
Recording magnetic tape with 9 magnetic tracks, 12.7mm width and 32 lines/mm for information processing exchange
价格：￥0.00
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广播录音磁带的盘芯和带盘
Hub and reel spool of broadcast audio tape
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