nonreturn-to-zero recording
...归零操作 nonreturn-to-zero operation 非归零记录，不归零（制）记录（技术），不归零记录 nonreturn-to-zero recording ..
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短语
非归零记录法
nonreturn to reference recording
非极性归零记录制
nonpolarized return to zero recording
非极性归零制记录
[计]
nonpolarized return-to-zero record
非极化归零记录
non-polarized return-to-zero recording