而垂直记录技术磁头的返回极(Return Pole)很宽，磁通量密度较低，这样就可以避免返回极下方的磁单元发生翻转。
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Double pole Return 双极回归
single pole-ground return 单极大地返回
Double-pole return-to-zero code 双极性归零码
They ran out of food during their return from the pole and perished.
BBC: Scott centenary trek: Henry Evans reaches South Pole
It was a decision which would save Evans's life, because Scott and his four companions would perish on their return from the pole.
BBC: Scott of Antarctic 'propaganda created Welsh obsession'
Michael Schumacher starts from pole position in his Ferrari, an apparent return to form after a disappointing 2005.
BBC: SPORT | Motorsport | Formula One | Bahrain Grand Prix as it happened
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