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刚才看见一盘开盘带的说明:
3 M) `, m: z, H! [+ k3 DThis magnetic tape recording should be reproduced at a speed of 7 1/2 inches per second using "a half track head" as normally provided on dual track machine.4 s8 ?5 G/ P/ A2 w$ [
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这里的“a half track head”是什么磁头?' H: v& [- A! b" Q
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还有一盘磁带写着1/4 track 7-1/2IPS stereo tape recording./ p* R! Z4 [4 H, `5 z# @) g! f2 u
这里的1/4 track什么意思?
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" A& q2 }& ?$ Y* ]0 ~请懂的开友予以解答,谢谢! |
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