Part: This part mainly investigates the copyright collective management system and technology protection measures.
第四部分：主要探讨了对于版权的集体管理制度和版权的技术保护措施。
The designing, construction, technology of grouting curtain engineering of the Hongyuan mansion are presented and its protection measures which should be taken are summarized.
阐述宏源大厦防渗帷幕的设计要点、施工工艺、施工方法，以及施工中采取的质量管理措施，最后对施工工作了总结。
A practical usage mode of network-type protection and concerned safe measures are introduced for the application of network technology in the substation.
针对变电站自动化中网络技术的应用情况，提出了一种具体的网络型保护的应用方式及相应的安全措施。
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