电流密度 ampere density; cd current density; curl density; c．d．current density; density current; electric current de ity; electric current density
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cd current density
CD电流密度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It should be a simple upgrade in manufacturing technology to go from manufacturing the current CD to making the Double Density CD.
FORBES: Sony Establishes New, Obsolete CD-ROM Format
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