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由磁头录在磁带上的磁信号的失真大小与磁带上磁性涂层的剩磁特性密切相关,不同的磁性材料有不同的磁滞回线,如图1所示。
The magnitude of the distortion of the magnetic signal recorded on the tape by the magnetic head is closely related to the remanent magnetic properties of the magnetic coating on the magnetic tape. Different magnetic materials have different hysteresis loops, as shown in FIG. 1.