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degauss ['di:'gaus] v
gen.	消〔去，退〕磁; 去除船只的磁场
archit.	去消磁
auto.	动去退，消磁; 删除信息
oil	消磁
space	去磁; 退磁
English thesaurus
degauss ['di:'gaus] v
IT	The application of variable levels of alternating current for the purpose of demagnetizing magnetic recording media (The process involves increasing the alternating current field gradually from zero to some maximum value and back to zero, leaving a very low residue of magnetic induction on the media. Degauss loosely means to erase)