The paper analyses the status of mine's closedown in our country and the characteristics of mine enterprise, propounds a suggestion about establishing an effective closedown insurance system which obeys the law of market economy and is adapt to the characteristics of mine enterprise.

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Chapter four, playing the pivotal role of this dissertation, propounds the categorization of legal rules.

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In accordance with the problem of information security, this thesis propounds a program to set up corresponding preliminary security facilities.

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On the base,the dissertation reviews achievement and defect of research,and propounds research direction in the future.

在整理的基礎(chǔ)上，對(duì)國(guó)外的研究成果和缺陷做了相應(yīng)的評(píng)價(jià)日韩乱码无码中文视频，并對(duì)未來(lái)的研究方向和重點(diǎn)闡述了意見AV美女激情在线。

Chapter 7 makes a conclusion and propounds the direction of deep research.

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