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刚才看见一盘开盘带的说明:3 R# ^/ |8 G" \6 i" y4 M3 k
This 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.: G, V/ d7 a# ], I
: ~3 a+ [6 h$ e8 \这里的“a half track head”是什么磁头?9 K; q q; n/ E) C- `, C
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还有一盘磁带写着1/4 track 7-1/2IPS stereo tape recording.
2 i' L l$ Q2 F h5 }这里的1/4 track什么意思?; z7 E$ J- H j1 [- P' b
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请懂的开友予以解答,谢谢! |
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