Analyzed the character of electromagnetic compatibility based on the situation of coal mine in China. Key questions and research methods of electromagnetic compatibility were presented.
针对我国煤矿特点，分析了煤矿井下电磁环境的特殊性，提出了煤矿井下电磁兼容性关键问题及研究方法。
2
The compatibility demand and the interconnection problem which are brought by the externalities character of the network industry are the focus of network industry research.
网络产业的外部性特征所带来的兼容性要求，以及由此导致的互联互通问题是研究网络产业关注的焦点。
3
The compatibility of protection of chattel on character and content will determine the feasibility of couple protection of chattel on one content.