Then the curves of magnetic strips field ( B) with length ( L ) and magnetic roller field( B) with its angle (DEG) are described by printer.

通过打印机绘图仪输出了磁条的磁场（ B） 与长度（ L ） 的曲线、磁辊的磁场（ B） 与角度（DEG） 的曲线。

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Bdi says that though this is an essential step, the length of this review period should be limited.

VOA: standard.2009.09.29

B, James is at arm's length from News Corp, and he answers not only to his father but also to other shareholders.

ECONOMIST: Family businesses

Each marathon course was approximately twenty-five miles, believed to be the length of the route from Marathon to Athens run by Pheidippides in 490 B.

NEWYORKER: Glory Days