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刚才看见一盘开盘带的说明:
! o5 Y. b. Q9 I# C( j* o7 Y, {2 \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.
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这里的“a half track head”是什么磁头?
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4 Y& t4 q9 O5 n还有一盘磁带写着1/4 track 7-1/2IPS stereo tape recording.- K' b4 Z0 ^! _: R
这里的1/4 track什么意思?: A2 q: Y' w, \$ [+ x/ { u
; D! e, z' ^# O/ v/ p请懂的开友予以解答,谢谢! |
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