特殊用法a-c[d-c] erasure1.用交[直]流电消除(记录)continuous erasure1.连续消除(记录)demagnetized erasure1.去磁抹音(法)Doom erasure1.(转换语法)杜姆削除high-frequency erasure1.高频消磁saturated erasure1.饱和消磁法