简述企业建立专利信息系统的必要性。
The necessity of establishing patent information system is given brief introduction.
第三部分对我国建立专利间接侵权的必要性与可行性进行分析。
The third pare analysis the necessity and feasibility of the infringement's establishment in China.
第三部分，说明我国专利间接侵权现状并论述我国设立专利间接侵权制度的必要性。
Part three, Prove of our country patent infringe current situation and expound the fact our country set up patent infringe necessity of the system indirectly.
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