密装：把数据压缩及贮存于磁体贮存媒介内以节省贮存空间。解开密装是把压缩的数据还原的意思。

Pack: To compress and store data in a magnetic storage medium so as to save storage space. Unpack refers to de compressing.

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与其它方法比较，本方法节省较多的贮存空间和CPU时间。

Compared with other published approaches, this one saves much more memory space and CPU time.

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