Description of symbols used in Figs 2, 3 and 4 corresponding to the technology sectors and fields given in the IPC-Technology Concordance Table (WIPO, 2012).
收藏数据链接：
官方服务：
资源简介：
Description of symbols used in Figs 2, 3 and 4 corresponding to the technology sectors and fields given in the IPC-Technology Concordance Table (WIPO, 2012).
创建时间：
2018-02-09
