About Google PatentsOverviewSearch and read the full text of patents from around the world.下一页: CoveragePatents from around the world, translated Plus technical papers and books, organized and labeled automatically Search for prior art, all in one place Understand results, with images, PDFs and citations Security technology and the Privacy Policy protect your data https://patents.google.com 下一页: Coverage 该内容对您有帮助吗？您有什么改进建议？是否提交